Someone built a WhatsApp booking agent in n8n that confirms and reminds
In plain words
A Reddit user shared an n8n agent that books appointments over WhatsApp, sends confirmations and reminders automatically.
Still a trial: Books, confirms and reminds automatically. The builder shared no numbers.
These numbers come from the builder and haven't been checked independently.
Source: reddit.com ↗
How to do it yourself
Our suggested steps. The company didn't publish theirs.
- 1
Get WhatsApp Business API access (via Meta or Twilio).
- 2
In n8n, trigger on incoming WhatsApp messages.
- 3
Send them to ChatGPT with the prompt below plus free slots from Google Calendar.
- 4
When it confirms a slot, create the event and send a confirmation.
- 5
Add a reminder workflow 24 hours before.
The instructions to give the AI
Paste this into ChatGPT (the free plan is fine), swap the [brackets] for your details, and test it on a few real examples.
This is one part of the setup. It won't connect to your phone, inbox or other apps on its own; the steps above cover that.
Agent instructions (prompt)
You book appointments for [business] on WhatsApp. Free slots: [list]. Ask for name and preferred time, offer up to 3 slots, confirm one. Reply in short, friendly messages. Output BOOK: {name, time} when confirmed.[Highlighted] = replace with your own details before you run it.
What you should get back: "Hi Ana! We have Tue 3pm or Wed 10am — which suits? 😊" ending in a confirmed booking.
Written by Quickly and Good, inspired by this case.
More detail: tools, prices and what you'll need
The company used: n8n + WhatsApp Business API + Google Calendar + ChatGPT
You could use: n8n + WhatsApp Business API + Google Calendar + ChatGPT
- ChatGPT
General AI assistant: writes, summarises and answers from files you give it.
Free plan; paid plans available · Official site ↗
- n8n
Workflow automation that connects apps and adds AI steps; can be self-hosted.
Free to self-host (Community Edition); cloud: see pricing · Official site ↗
Prices from each tool's own pricing page, checked Oct 2026.
What you'll need
- ☐A WhatsApp Business API account (approval can take days)
- ☐A messaging/automation platform to run the agent
- ☐Connection to your calendar, booking or order system
- ☐A knowledge base of your FAQs, prices and policies
- ☐The agent instructions (prompt)
- ☐Testing with real customer questions
- ☐Hand-off to a person in the same chat
Can I do this myself?
Possible with no-code tools, but WhatsApp API setup is fiddly. Hire a builder if you have not done it before.
Similar cases
CMA CGM's AI voice agents resolve 46% of cargo release calls
More than 46% of cargo release enquiries are resolved by the AI agents, and about a third of 4,000 customers called by the sales agent moved on to active discussions.
ElevenLabs' own AI support agent resolves 65% of its tickets
65% of tickets resolved end to end, first reply in about 60 seconds instead of hours, and 70% positive ratings.
Telstra lets an AI agent sort refunds while customers wait for repairs
Refunds are worked out and paid automatically once service is back, which takes admin off 1,000+ staff.