Building an AI Appointment Booking System in 30 Minutes

April 25, 2026 • 8 min read

One of the most common use cases for AI agents is appointment booking. In this tutorial, we'll build a complete system where customers can check availability and book appointments through natural conversation.

What We're Building

By the end of this tutorial, you'll have an AI agent that can:

• Answer questions about your services
• Check real-time availability on Google Calendar
• Book appointments and send confirmation emails
• Handle rescheduling and cancellations

Prerequisites

• Indexu installed and running
• A Google Cloud account with Calendar API enabled
• About 30 minutes

Step 1: Connect Google Calendar

First, we need to connect your Google Calendar to Indexu.

Go to Integrations → Add Integration → Google Calendar and click "Connect with Google". Authorize access to your calendar.

Once connected, select which calendar to use for bookings. You can create a dedicated "Appointments" calendar if you want to keep things separate.

Step 2: Create the AI Agent

Navigate to Agents → Create Agent and configure:

• Name: Appointment Assistant
• System Prompt: See below
• Tools: Enable Google Calendar integration

Here's a system prompt that works well:

You are a friendly appointment booking assistant for [Your Business Name].

Your job is to help customers:
1. Learn about our services
2. Check available appointment times
3. Book, reschedule, or cancel appointments

When booking appointments:
- Always confirm the date, time, and service before booking
- Collect the customer's name and email
- Appointments are 30 minutes unless specified otherwise
- Business hours are Monday-Friday, 9 AM - 5 PM

Be conversational and helpful. If you can't help with something, offer to connect them with a human.

Step 3: Add Your Knowledge Base

The AI needs to know about your services to answer questions accurately.

Go to Knowledge → Create Knowledge Base and add information about:

• Services you offer and pricing
• Location and contact information
• Policies (cancellation, rescheduling, etc.)
• Frequently asked questions

You can upload documents, paste text, or even crawl your existing website.

Step 4: Create a Channel

Now let's create a web chat widget to embed on your website.

Go to Channels → Create Channel → Web Chat:

• Select your Appointment Assistant agent
• Customize the widget colors to match your brand
• Set a welcome message like "Hi! I can help you book an appointment. What service are you interested in?"

Copy the embed code and add it to your website.

Step 5: Test It Out

Open your website and try the chat widget. Here's a sample conversation:

Going Further

Once you have the basics working, consider adding:

• SMS reminders via Twilio integration
• WhatsApp channel for customers who prefer messaging
• Workflow automation to send follow-up emails after appointments
• Human escalation for complex scheduling requests

Conclusion

In about 30 minutes, you've built an AI appointment booking system that works 24/7, handles natural conversation, and integrates directly with your calendar. No coding required.

The same pattern works for other use cases: connect an integration, give the AI context through your knowledge base, and deploy through a channel.

Need help getting started?
Request a demo and we'll walk you through setting up Indexu for your specific use case.