Restaurant reservation management with OpenAI GPT and Google Sheets

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

How it works Receives chat messages from customers requesting table reservations. Uses an AI Agent with OpenAI Chat Model to understand and process requests. Checks table ...

Best for

Support Chatbot automation workflows
Multimodal AI automation workflows
advanced n8n builders looking for reusable templates

Tools used

@n8n/n8n-nodes-langchain.chattrigger, n8n-nodes-base.googlesheetstool, @n8n/n8n-nodes-langchain.memorybufferwindow, @n8n/n8n-nodes-langchain.lmchatopenai, @n8n/n8n-nodes-langchain.agent, n8n-nodes-base.stickynote, @n8n/n8n-nodes-langchain.toolcalculator

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Fakhar Khan.

Original n8n.io source

1.1 Workflow description

Title: Restaurant reservation management with OpenAI GPT and Google Sheets
Workflow name: Restaurant reservation management with OpenAI GPT and Google Sheets

How it works

Receives chat messages from customers requesting table reservations.
Uses an AI Agent with OpenAI Chat Model to understand and process requests.
Checks table information, availability, and existing reservations from Google Sheets.
Calculates guest counts and reservation timing using the Calculator node.
Updates table availability and reservation records in real-time.
Handles reservation changes, including updates and cancellations.

Set up steps

Add credentials for OpenAI (Chat Model) and Google Sheets.
In the AI Agent node, link:
- Chat Model → OpenAI Chat Model node.
- Memory → Simple Memory node.
- Tools → Calculator and Google Sheets nodes for reservation data handling.
Configure Google Sheets nodes:
- Get Table Information (read sheet)
- Get Table Availability (read sheet)
- Get Table Reservations (read sheet)
- Update Table Availability (update sheet)
- Update Reservations (append sheet)
- Cancel Reservations (delete sheet)
Ensure your sheets have consistent column names for table IDs, dates, times, and guest counts.
Test by sending a reservation request through the chat trigger and verify updates in the Google Sheets.

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - When chat message received

Type / Role: @n8n/n8n-nodes-langchain.chatTrigger - chatTrigger
Config choices: Version 1.1

Block 2 - Get Table Information

Type / Role: n8n-nodes-base.googleSheetsTool - googleSheetsTool
Config choices: Version 4.6

Block 3 - Get Table Availability

Type / Role: n8n-nodes-base.googleSheetsTool - googleSheetsTool
Config choices: Version 4.6

Block 4 - Get Table Reservations

Type / Role: n8n-nodes-base.googleSheetsTool - googleSheetsTool
Config choices: Version 4.6

Block 5 - Simple Memory

Type / Role: @n8n/n8n-nodes-langchain.memoryBufferWindow - memoryBufferWindow
Config choices: Version 1.3

Block 6 - Update Reservations

Type / Role: n8n-nodes-base.googleSheetsTool - googleSheetsTool
Config choices: Version 4.6

Block 7 - Cancel Reservations

Type / Role: n8n-nodes-base.googleSheetsTool - googleSheetsTool
Config choices: Version 4.6

Block 8 - OpenAI Chat Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1.2

Block 9 - AI Agent

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 2.1

Block 10 - Update Table Availabilty

Type / Role: n8n-nodes-base.googleSheetsTool - googleSheetsTool
Config choices: Version 4.6

Block 11 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 12 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 13 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 14 - Calculator

Type / Role: @n8n/n8n-nodes-langchain.toolCalculator - toolCalculator
Config choices: Version 1

Block 15 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Restaurant reservation management with OpenAI GPT and Google Sheets
Complexity	advanced
Nodes	15
Categories	Support Chatbot, Multimodal AI
Author	Fakhar Khan
Published	13 Aug 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/7323/7323.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Support Chatbot workflows Multimodal AI workflows

Frequently asked questions

What does Restaurant reservation management with OpenAI GPT and Google Sheets do?

How it works Receives chat messages from customers requesting table reservations. Uses an AI Agent with OpenAI Chat Model to understand and process requests. Checks table ...

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Support Chatbot, Multimodal AI use case.

Fakhar Khan

3 workflows

Nodes

@n8n/n8n-nodes-langchain.chattrigger n8n-nodes-base.googlesheetstool @n8n/n8n-nodes-langchain.memorybufferwindow @n8n/n8n-nodes-langchain.lmchatopenai @n8n/n8n-nodes-langchain.agent n8n-nodes-base.stickynote @n8n/n8n-nodes-langchain.toolcalculator

Complexity

advanced

Published 13 Aug 2025

Likes 0

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Install path: /data/workflows/7323/7323.json

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Restaurant reservation management with OpenAI GPT and Google Sheets

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

How it works

Set up steps

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - When chat message received

Block 2 - Get Table Information

Block 3 - Get Table Availability

Block 4 - Get Table Reservations

Block 5 - Simple Memory

Block 6 - Update Reservations

Block 7 - Cancel Reservations

Block 8 - OpenAI Chat Model

Block 9 - AI Agent

Block 10 - Update Table Availabilty

Block 11 - Sticky Note

Block 12 - Sticky Note1

Block 13 - Sticky Note2

Block 14 - Calculator

Block 15 - Sticky Note3

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions