# Automate restaurant reservations with Google Sheets: n8n workflow

> Started by an incoming WhatsApp message, and works across Google Sheets and WhatsApp. It puts OpenAI behind a retrieval step, so answers are drawn from...

Source: https://millionrounds.com/workflow/automate-restaurant-reservations-with-google-sheets (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Scheduling](https://millionrounds.com/workflows?category=Scheduling#library)

# Automate restaurant reservations with Google Sheets

Started by an incoming WhatsApp message, and works across Google Sheets and WhatsApp. It puts OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 16 steps, 1 branch: a working afternoon to understand properly.

Medium Calls a model: OpenAI Retrieval

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fautomate-restaurant-reservations-with-google-sheets)

**16 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**2** Services it connects to

## The flow

Starts it 2 Model 4 Logic 3 Service 7

The steps in the order they run, from what starts it.

- 1 **WhatsApp Trigger** Whats App trigger *Starts it*
- 2 **OpenAI Chat Model** Lm Chat Open Ai *Model*
- 3 **log reservation** Google Sheets Tool *Service*
- 4 **Calculator** Tool Calculator *Model*
- 5 **Simple Memory** Memory Buffer Window *Model*
- 6 **Schedule Trigger** Schedule trigger *Starts it*
- 7 **Filter** Filter *Logic*
- 8 **AI Agent** Agent *Model*
- 9 **Get row(s) in sheet** Google Sheets *Service*
- 10 **Send message** Whats App *Service*
- 11 **If** If *Logic*
- 12 **Send message2** Whats App *Service*
- 13 **Filter1** Filter *Logic*
- 14 **Update row in sheet** Google Sheets *Service*
- 15 **Send message1** Whats App *Service*
- 16 **Update row in sheet1** Google Sheets *Service*

## How it's built

- **Starts on:** An incoming WhatsApp message
- **Steps:** 16, with 1 branch
- **Size:** Medium: a working afternoon
- **Connects to:** Google Sheets, WhatsApp
- **Model:** OpenAI
- **Retrieval:** Answers are drawn from documents you supply, not from the model alone

## Questions

What does it need to run?

An n8n account, plus your own Google Sheets and WhatsApp accounts, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an incoming WhatsApp message.

Does it use AI?

Yes. It calls OpenAI. Its answers draw on documents you give it, not on the model alone. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 16 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 16 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fautomate-restaurant-reservations-with-google-sheets)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Google Sheets](https://millionrounds.com/workflows?service=Google+Sheets#library)[WhatsApp](https://millionrounds.com/workflows?service=WhatsApp#library)

## Workflows like it

Also scheduling, with the same services where possible, closest in size first.

- [**Doctor appointment scheduler with Telegram and Gemini** 16 steps · calls a model · Google Sheets, Telegram](https://millionrounds.com/workflow/doctor-appointment-scheduler-with-telegram-and-gemini)
- [**Generate consulting KPI summaries with OpenAI and Slack** 16 steps · calls a model · Gmail, Google Calendar](https://millionrounds.com/workflow/generate-consulting-kpi-summaries-with-openai-and-slack)
- [**Handle WhatsApp sales inquiries with OpenAI and Pinecone** 16 steps · calls a model · Google Calendar, Pinecone](https://millionrounds.com/workflow/handle-whatsapp-sales-inquiries-with-openai-and-pinecone)
- [**Run a personal LINE assistant with Gemini and Gmail** 16 steps · calls a model · Gmail, Google Calendar](https://millionrounds.com/workflow/run-a-personal-line-assistant-with-gemini-and-gmail)
- [**Schedule meetings with WhatsApp and Gemini** 16 steps · calls a model · Google Calendar, Google Sheets](https://millionrounds.com/workflow/schedule-meetings-with-whatsapp-and-gemini)
- [**Send AI pet grooming reminders and follow-ups with OpenAI** 16 steps · calls a model · Email, Google Sheets](https://millionrounds.com/workflow/send-ai-pet-grooming-reminders-and-follow-ups-with-openai)