{ "workflow": { "id": 3657, "name": "Build a chatbot, voice and phone agent with Voiceflow, Google Calendar and RAG", "views": 31374, "recentViews": 4, "totalViews": 31374, "createdAt": "2025-04-22T06:42:30.604Z", "description": "**Voiceflow** is a no-code platform that allows you to design, prototype, and deploy conversational assistants across multiple channels—such as **chat**, **voice**, and **phone**—with advanced logic and natural language understanding. It supports integration with APIs, webhooks, and even tools like Twilio for phone agents. It's perfect for building customer support agents, voice bots, or intelligent assistants.\n\nThis workflow connects **n8n** and **Voiceflow** with tools like **Google Calendar**, **Qdrant (vector database)**, **OpenAI**, and an **order tracking API** to power a smart, multi-channel conversational agent.\n\n![image](https://i.postimg.cc/3rSPwMn2/langflow.png)\n\nThere are 3 main webhook endpoints in n8n that Voiceflow interacts with:\n\n1. **`n8n_order`** – receives user input related to order tracking, queries an API, and responds with tracking status.\n2. **`n8n_appointment`** – processes appointment booking, reformats date input using OpenAI, and creates a Google Calendar event.\n3. **`n8n_rag`** – handles general product/service questions using a RAG (Retrieval-Augmented Generation) system backed by:\n - **Google Drive** document ingestion,\n - **Qdrant vector store** for search,\n - and **OpenAI** models for context-based answers.\n\nEach webhook is connected to a corresponding **\"Capture\" block** inside Voiceflow, which sends data to n8n and waits for the response.\n\n---\n\n### **How It Works** \nThis n8n workflow integrates **Voiceflow** for chatbot/voice interactions, **Google Calendar** for appointment scheduling, and **RAG (Retrieval-Augmented Generation)** for knowledge-based responses. Here’s the flow: \n\n- **Trigger**: \n - Three webhooks (`n8n_order`, `n8n_appointment`, `n8n_rag`) receive inputs from Voiceflow (chat, voice, or phone calls). \n - Each webhook routes requests to specific functions: \n - **Order Tracking**: Fetches order status via an external API. \n - **Appointment Scheduling**: Uses OpenAI to parse dates, creates Google Calendar events, and confirms via WhatsApp. \n - **RAG System**: Queries a Qdrant vector store (populated with Google Drive documents) to answer customer questions using GPT-4. \n\n- **AI Processing**: \n - **OpenAI Chains**: Convert natural language dates to Google Calendar formats and generate responses. \n - **RAG Pipeline**: Embeds documents (via OpenAI), stores them in Qdrant, and retrieves context-aware answers. \n - **Voiceflow Integration**: Routes responses back to Voiceflow for multi-channel delivery (chat, voice, or phone). \n\n- **Outputs**: \n - Confirmation messages (e.g., \"Event created successfully\"). \n - Dynamic responses for orders, appointments, or product support. \n\n---\n\n### **Setup Steps** \n\n##### **Prerequisites**: \n- **APIs**: \n - Google Calendar & Drive OAuth credentials. \n - Qdrant vector database (hosted or cloud). \n - OpenAI API key (for GPT-4 and embeddings). \n\n##### **Configuration**: \n1. **Qdrant Setup**: \n - Run the **\"Create collection\"** and **\"Refresh collection\"** nodes to initialize the vector store. \n - Populate it with documents using the **Google Drive → Qdrant** pipeline (embeddings generated via OpenAI). \n\n2. **Voiceflow Webhooks**: \n - Link Voiceflow’s \"Captures\" to n8n’s webhook URLs (`n8n_order`, `n8n_appointment`, `n8n_rag`). \n\n3. **Google Calendar**: \n - Authenticate the **Google Calendar node** and set event templates (e.g., `summary`, `description`). \n\n4. **RAG System**: \n - Configure the **Qdrant vector store** and **OpenAI embeddings** nodes. \n - Adjust the **Retrieve Agent**’s system prompt for domain-specific queries (e.g., electronics store support). \n\n#### **Optional**: \n- Add Twilio for phone-agent capabilities. \n- Customize OpenAI prompts for tone/accuracy. \n\n![image](https://i.postimg.cc/855gyTZP/voiceflow-agent.png)\n![image](https://i.postimg.cc/5Nn4Sk43/voiceflow-agent2.png)\n\nPS. You can import a Twilio number to assign it to your agent for becoming a Phone Agent\n\n![image](https://i.postimg.cc/cLymTTFv/voiceflow-agent3.png)\n\n---\n### **Need help customizing?** \n[Contact me](mailto:info@n3w.it) for consulting and support or add me on [Linkedin](https://www.linkedin.com/in/davideboizza/)", "workflow": { "id": "MMDt8lGtac2oU8nI", "meta": { "instanceId": "a4bfc93e975ca233ac45ed7c9227d84cf5a2329310525917adaf3312e10d5462", "templateCredsSetupCompleted": true }, "name": "Build a Chatbot, Voice Agent and Phone Agent with Voiceflow, Google Calendar and RAG", "tags": [], "nodes": [ { "id": "20605948-5277-4fd7-9ba0-63f645bf2dcc", "name": "n8n_order", "type": "n8n-nodes-base.webhook", "position": [ -340, -140 ], "webhookId": "9ff7a394-5b4b-4790-a96b-c41c4ba27fa5", "parameters": { "path": "9ff7a394-5b4b-4790-a96b-c41c4ba27fa5", "options": {}, "responseMode": "responseNode" }, "typeVersion": 2 }, { "id": "9ef7971e-f679-4d5e-b347-3238d51a06d6", "name": "Google Calendar", "type": "n8n-nodes-base.googleCalendar", "position": [ 300, 280 ], "parameters": { "end": "={{ $json.output.end }}", "start": "={{ $json.output.start }}", "calendar": { "__rl": true, "mode": "list", "value": "user@example.com", "cachedResultName": "user@example.com" }, "additionalFields": { "summary": "=Event title with {{ $('n8n_appointment').item.json.query.Email }}", "description": "Event description" } }, "credentials": { "googleCalendarOAuth2Api": { "id": "credential-id", "name": "googleCalendarOAuth2Api Credential" } }, "typeVersion": 1.3 }, { "id": "17b9f162-c4a3-43ec-b640-a68ebc67b0c9", "name": "OpenAI Chat Model3", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [ -120, 480 ], "parameters": { "model": { "__rl": true, "mode": "list", "value": "gpt-4o-mini" }, "options": {} }, "credentials": { "openAiApi": { "id": "credential-id", "name": "openAiApi Credential" } }, "typeVersion": 1.2 }, { "id": "5b40db3c-6c98-4fea-9c3b-98ba7e13bc30", "name": "Concert start date", "type": "@n8n/n8n-nodes-langchain.chainLlm", "position": [ -80, 280 ], "parameters": { "text": "=Convert this date to a compatible format for Google Calendar APIs for the start date, and for the end date add 1 hour to the start date.\n\nHere is the start date:\n{{ $json.query.Appointment_date }}", "promptType": "define", "hasOutputParser": true }, "typeVersion": 1.6 }, { "id": "8931d21a-7c30-40ae-b0b0-1f5f6868b3a3", "name": "n8n_appointment", "type": "n8n-nodes-base.webhook", "position": [ -340, 280 ], "webhookId": "f5edfe92-649b-40da-ab35-f818ccb55ad4", "parameters": { "path": "f5edfe92-649b-40da-ab35-f818ccb55ad4", "options": {}, "responseMode": "responseNode" }, "typeVersion": 2 }, { "id": "fa3e66ca-de09-496b-be14-483b33386e07", "name": "Retrive Qdrant Vector Store", "type": "@n8n/n8n-nodes-langchain.vectorStoreQdrant", "position": [ 20, 1280 ], "parameters": { "options": {}, "qdrantCollection": { "__rl": true, "mode": "list", "value": "scarperia", "cachedResultName": "scarperia" } }, "credentials": { "qdrantApi": { "id": "credential-id", "name": "qdrantApi Credential" } }, "typeVersion": 1 }, { "id": "ea7be112-1949-47b7-b68b-ae2f3a7b1b71", "name": "Embeddings OpenAI2", "type": "@n8n/n8n-nodes-langchain.embeddingsOpenAi", "position": [ -20, 1460 ], "parameters": { "options": {} }, "credentials": { "openAiApi": { "id": "credential-id", "name": "openAiApi Credential" } }, "typeVersion": 1.2 }, { "id": "e61ff57f-a109-41e0-87f3-522b1fa78dd6", "name": "RAG", "type": "@n8n/n8n-nodes-langchain.toolVectorStore", "position": [ 180, 1080 ], "parameters": { "name": "company_data", "description": "Retrive data about company knowledge from vector store" }, "typeVersion": 1 }, { "id": "fce158b8-73a3-42c1-baf3-9f2ae979fe15", "name": "OpenAI Chat Model2", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [ -20, 1080 ], "parameters": { "model": { "__rl": true, "mode": "list", "value": "gpt-4o-mini" }, "options": {} }, "credentials": { "openAiApi": { "id": "credential-id", "name": "openAiApi Credential" } }, "typeVersion": 1.2 }, { "id": "e2bcfa68-3642-4e49-89cb-e08faade984c", "name": "OpenAI Chat Model1", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [ 340, 1300 ], "parameters": { "model": { "__rl": true, "mode": "list", "value": "gpt-4o-mini" }, "options": {} }, "credentials": { "openAiApi": { "id": "credential-id", "name": "openAiApi Credential" } }, "typeVersion": 1.2 }, { "id": "2a79c66c-040b-4ca2-ad91-a0683d0d2996", "name": "Retrive Agent", "type": "@n8n/n8n-nodes-langchain.agent", "position": [ 60, 860 ], "parameters": { "text": "={{ $json.query.Question }}", "agent": "conversationalAgent", "options": { "systemMessage": "You are an AI-powered assistant for an electronics store. Your primary goal is to assist customers by providing accurate and helpful information about products, troubleshooting tips, and general support. Use the provided knowledge base (retrieved documents) to answer questions with precision and professionalism.\n\n**Guidelines**:\n1. **Product Information**:\n - Provide detailed descriptions of products, including specifications, features, and compatibility.\n - Highlight key selling points and differences between similar products.\n - Mention availability, pricing, and promotions if applicable.\n\n2. **Technical Support**:\n - Offer step-by-step troubleshooting guides for common issues.\n - Suggest solutions for setup, installation, or configuration problems.\n - If the issue is complex, recommend contacting the store’s support team for further assistance.\n\n3. **Customer Service**:\n - Respond politely and professionally to all inquiries.\n - If a question is unclear, ask for clarification to provide the best possible answer.\n - For order-related questions (e.g., status, returns, or cancellations), guide customers on how to proceed using the store’s systems.\n\n4. **Knowledge Base Usage**:\n - Always reference the provided knowledge base (retrieved documents) to ensure accuracy.\n - If the knowledge base does not contain relevant information, inform the customer and suggest alternative resources or actions.\n\n5. **Tone and Style**:\n - Use a friendly, approachable, and professional tone.\n - Avoid technical jargon unless the customer demonstrates familiarity with the topic.\n - Keep responses concise but informative.\n\n**Example Interactions**:\n1. **Product Inquiry**:\n - Customer: \"What’s the difference between the XYZ Smartwatch and the ABC Smartwatch?\"\n - AI: \"The XYZ Smartwatch features a longer battery life (up to 7 days) and built-in GPS, while the ABC Smartwatch has a brighter AMOLED display and supports wireless charging. Both are compatible with iOS and Android devices. Would you like more details on either product?\"\n\n2. **Technical Support**:\n - Customer: \"My wireless router isn’t connecting to the internet.\"\n - AI: \"Please try the following steps: 1) Restart your router and modem. 2) Ensure all cables are securely connected. 3) Check if the router’s LED indicators show a stable connection. If the issue persists, you may need to reset the router to factory settings. Would you like a detailed guide for resetting your router?\"\n\n3. **Customer Service**:\n - Customer: \"How do I return a defective product?\"\n - AI: \"To return a defective product, please visit our Returns Portal on our website and enter your order number. You’ll receive a return label and instructions. If you need further assistance, our support team is available at user@example.com.\"\n\n**Limitations**:\n- If the question is outside the scope of the knowledge base or requires human intervention, inform the customer and provide contact details for the appropriate department.\n- Do not provide speculative or unverified information. Always rely on the knowledge base or direct the customer to official resources." }, "promptType": "define" }, "typeVersion": 1.7 }, { "id": "be516c9c-d2fb-4dea-9a3b-9674be5ea689", "name": "n8n_rag", "type": "n8n-nodes-base.webhook", "position": [ -360, 860 ], "webhookId": "edb1e894-1210-4902-a34f-a014bbdad8d8", "parameters": { "path": "edb1e894-1210-4902-a34f-a014bbdad8d8", "options": {}, "responseMode": "responseNode" }, "typeVersion": 2 }, { "id": "2412721d-7353-4a27-8068-5c90872c7a51", "name": "Tracking response", "type": "n8n-nodes-base.set", "position": [ 360, -140 ], "parameters": { "options": {}, "assignments": { "assignments": [ { "id": "86f332ff-7b89-4dd4-8df9-06c081625d33", "name": "text", "type": "string", "value": "=Your order status is: {{ $json.status }}" } ] } }, "typeVersion": 3.4 }, { "id": "4965d781-1452-42c9-8a84-baacb5abe97f", "name": "Calendar response", "type": "n8n-nodes-base.set", "position": [ 500, 280 ], "parameters": { "options": {}, "assignments": { "assignments": [ { "id": "0fe6fe50-9263-479a-ab01-ca1d15ce2412", "name": "text", "type": "string", "value": "L'evento è stato creato con successo" } ] } }, "typeVersion": 3.4 }, { "id": "5311be28-2878-41ce-a70f-4e4aebcea0f9", "name": "Webhook tracking response", "type": "n8n-nodes-base.respondToWebhook", "position": [ 700, -140 ], "parameters": { "options": {} }, "typeVersion": 1.1 }, { "id": "84d8558f-e6fd-400e-ae2e-0b5fec309561", "name": "API URL Tracking", "type": "n8n-nodes-base.httpRequest", "position": [ 20, -140 ], "parameters": { "url": "URL_TRACKING", "options": {}, "sendBody": true, "bodyParameters": { "parameters": [ { "name": "Order number", "value": "={{ $json.Order_number }}" }, { "name": "Email", "value": "={{ $json.Order_number }}" } ] } }, "typeVersion": 4.2 }, { "id": "32eb8645-c56e-4db4-8870-f28161cba048", "name": "Webhook calendar response", "type": "n8n-nodes-base.respondToWebhook", "position": [ 700, 280 ], "parameters": { "options": {} }, "typeVersion": 1.1 }, { "id": "72e7f085-d1e7-4967-aaa5-161ff0e83c06", "name": "Structured Output Parser", "type": "@n8n/n8n-nodes-langchain.outputParserStructured", "position": [ 140, 480 ], "parameters": { "schemaType": "manual", "inputSchema": "{\n\t\"type\": \"object\",\n\t\"properties\": {\n\t\t\"start\": {\n\t\t\t\"type\": \"string\"\n\t\t},\n\t\t\"end\": {\n\t\t\t\"type\": \"string\"\n\t\t}\n\t}\n}" }, "typeVersion": 1.2 }, { "id": "3822b875-73f0-4700-8fc4-e4d3285f593a", "name": "Webhook RAG response", "type": "n8n-nodes-base.respondToWebhook", "position": [ 700, 860 ], "parameters": { "options": {} }, "typeVersion": 1.1 }, { "id": "0b43f63b-3c00-4db4-8b28-9938add9fdbe", "name": "Sticky Note", "type": "n8n-nodes-base.stickyNote", "position": [ 1100, -1320 ], "parameters": { "width": 1140, "height": 2200, "content": "# STEP 6 - VOICEFLOW\n\n- Register on [Voiceflow](https://www.voiceflow.com/) \n- Create the workflow as shown in the following image\n![image](https://i.postimg.cc/3rSPwMn2/langflow.png)\n- There are 3 \"Captures\":\n-- n8n_order\n-- n8n_appointment\n-- n8n_rag\n- Add in the created functions the url of the corresponding n8n Webhook trigger node\n- Test your Agent\n- Get your projectID\n- In the Widget section choose Chat or Voice and copy the installation script\n![image](https://i.postimg.cc/855gyTZP/voiceflow-agent.png)\n![image](https://i.postimg.cc/5Nn4Sk43/voiceflow-agent2.png)\n\nPS. You can import a Twilio number to assign it to your agent for becoming a Phone Agent\n![image](https://i.postimg.cc/cLymTTFv/voiceflow-agent3.png)\n\n" }, "typeVersion": 1 }, { "id": "589165c8-920d-40e3-8e28-50e94dd37555", "name": "When clicking ‘Test workflow’", "type": "n8n-nodes-base.manualTrigger", "position": [ -380, -1120 ], "parameters": {}, "typeVersion": 1 }, { "id": "74c314bb-c445-42f8-8f9d-2ab646486044", "name": "Qdrant Vector Store", "type": "@n8n/n8n-nodes-langchain.vectorStoreQdrant", "position": [ 600, -1000 ], "parameters": { "mode": "insert", "options": {}, "qdrantCollection": { "__rl": true, "mode": "id", "value": "=" } }, "credentials": { "qdrantApi": { "id": "credential-id", "name": "qdrantApi Credential" } }, "typeVersion": 1 }, { "id": "01c05ac3-ac5c-4f1a-a756-db8de4a30e56", "name": "Create collection", "type": "n8n-nodes-base.httpRequest", "position": [ -80, -1260 ], "parameters": { "url": "https://QDRANTURL/collections/COLLECTION", "method": "POST", "options": {}, "jsonBody": "{\n \"filter\": {}\n}", "sendBody": true, "sendHeaders": true, "specifyBody": "json", "authentication": "genericCredentialType", "genericAuthType": "httpHeaderAuth", "headerParameters": { "parameters": [ { "name": "Content-Type", "value": "application/json" } ] } }, "credentials": { "httpHeaderAuth": { "id": "credential-id", "name": "httpHeaderAuth Credential" } }, "typeVersion": 4.2 }, { "id": "2d7adb45-aae7-4617-b1d1-5a23f3eb3b20", "name": "Refresh collection", "type": "n8n-nodes-base.httpRequest", "position": [ -80, -1000 ], "parameters": { "url": "https:/YOUR_AWS_SECRET_KEY_HERE/delete", "method": "POST", "options": {}, "jsonBody": "{\n \"filter\": {}\n}", "sendBody": true, "sendHeaders": true, "specifyBody": "json", "authentication": "genericCredentialType", "genericAuthType": "httpHeaderAuth", "headerParameters": { "parameters": [ { "name": "Content-Type", "value": "application/json" } ] } }, "credentials": { "httpHeaderAuth": { "id": "credential-id", "name": "httpHeaderAuth Credential" } }, "typeVersion": 4.2 }, { "id": "5e406bd7-8a93-4db2-8d3d-e92e8c9f4f01", "name": "Get folder", "type": "n8n-nodes-base.googleDrive", "position": [ 140, -1000 ], "parameters": { "filter": { "driveId": { "__rl": true, "mode": "list", "value": "My Drive", "cachedResultUrl": "https://drive.google.com/drive/my-drive", "cachedResultName": "My Drive" }, "folderId": { "__rl": true, "mode": "id", "value": "=test-whatsapp" } }, "options": {}, "resource": "fileFolder" }, "credentials": { "googleDriveOAuth2Api": { "id": "credential-id", "name": "googleDriveOAuth2Api Credential" } }, "typeVersion": 3 }, { "id": "f1f883fb-c9d1-42e6-98c2-791ed85e959f", "name": "Download Files", "type": "n8n-nodes-base.googleDrive", "position": [ 360, -1000 ], "parameters": { "fileId": { "__rl": true, "mode": "id", "value": "={{ $json.id }}" }, "options": { "googleFileConversion": { "conversion": { "docsToFormat": "text/plain" } } }, "operation": "download" }, "credentials": { "googleDriveOAuth2Api": { "id": "credential-id", "name": "googleDriveOAuth2Api Credential" } }, "typeVersion": 3 }, { "id": "5fd88e03-3638-4d38-8df4-246e4a5f2bda", "name": "Embeddings OpenAI", "type": "@n8n/n8n-nodes-langchain.embeddingsOpenAi", "position": [ 580, -800 ], "parameters": { "options": {} }, "credentials": { "openAiApi": { "id": "credential-id", "name": "openAiApi Credential" } }, "typeVersion": 1.1 }, { "id": "3740a841-e272-44f9-b76d-51fb90137fd3", "name": "Default Data Loader", "type": "@n8n/n8n-nodes-langchain.documentDefaultDataLoader", "position": [ 760, -800 ], "parameters": { "options": {}, "dataType": "binary" }, "typeVersion": 1 }, { "id": "075d1038-d1fd-4527-8eda-961f20c7869a", "name": "Token Splitter", "type": "@n8n/n8n-nodes-langchain.textSplitterTokenSplitter", "position": [ 760, -600 ], "parameters": { "chunkSize": 300, "chunkOverlap": 30 }, "typeVersion": 1 }, { "id": "57cc8eaf-26b3-480f-ab5d-c8646519cfa3", "name": "Sticky Note3", "type": "n8n-nodes-base.stickyNote", "position": [ 120, -1320 ], "parameters": { "color": 6, "width": 880, "height": 220, "content": "# STEP 1\n\n## Create Qdrant Collection\nChange:\n- QDRANTURL\n- COLLECTION" }, "typeVersion": 1 }, { "id": "70bc0676-c0ea-4de8-8659-bfb8b0ea653f", "name": "Sticky Note4", "type": "n8n-nodes-base.stickyNote", "position": [ -100, -1060 ], "parameters": { "color": 4, "width": 620, "height": 400, "content": "# STEP 2\n\n\n\n\n\n\n\n\n\n\n\n\n## Documents vectorization with Qdrant and Google Drive\nChange:\n- QDRANTURL\n- COLLECTION" }, "typeVersion": 1 }, { "id": "411c4f55-ae41-49b5-a821-df1a3d8fefec", "name": "Sticky Note5", "type": "n8n-nodes-base.stickyNote", "position": [ -380, 660 ], "parameters": { "color": 5, "width": 1220, "content": "# STEP 5\nIf required retrive the informations by RAG system" }, "typeVersion": 1 }, { "id": "49d1fe78-4c38-4508-84c3-3a571ad9a2b0", "name": "Sticky Note6", "type": "n8n-nodes-base.stickyNote", "position": [ -360, -360 ], "parameters": { "color": 5, "width": 1220, "content": "# STEP 3\nIf required retrive the informations by Order system\n- Set your API URL Tracking service" }, "typeVersion": 1 }, { "id": "23d42754-0126-4b3a-91b0-b489ef83b36c", "name": "Sticky Note7", "type": "n8n-nodes-base.stickyNote", "position": [ -360, 80 ], "parameters": { "color": 5, "width": 1220, "content": "# STEP 4\nIf required retrive the informations by Appointment system" }, "typeVersion": 1 } ], "active": false, "pinData": {}, "settings": { "executionOrder": "v1" }, "versionId": "20a19983-4edb-4179-a2d2-e2f53d0daf85", "connections": { "RAG": { "ai_tool": [ [ { "node": "Retrive Agent", "type": "ai_tool", "index": 0 } ] ] }, "n8n_rag": { "main": [ [ { "node": "Retrive Agent", "type": "main", "index": 0 } ] ] }, "n8n_order": { "main": [ [ { "node": "API URL Tracking", "type": "main", "index": 0 } ] ] }, "Get folder": { "main": [ [ { "node": "Download Files", "type": "main", "index": 0 } ] ] }, "Retrive Agent": { "main": [ [ 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