AI-Agent Powered SMS Appointment Scheduling & Management

The Project

A multi-location service business needed to modernize appointment scheduling by automating bookings and reducing manual admin work. They aimed to build an SMS-based intelligent agent that offers 24/7 self-service scheduling while accurately sharing their frequently changing daily locations.

Location

USA

Industry

Automation & AI

Project Duration

2 Weeks

Team Size

1 Person

Technologies Used

n8n, OpenAI GPT-4, SMS Gateway API, Calendar Integration,Google Gemini, Redis , Cal.com

What Our Client Says?

“This SMS AI agent transformed our booking process completely. Customers can now schedule appointments 24/7 through simple text messages, and our conversion rates increased dramatically!”

Matthew Head

Business Owner

The Challenge

Staff were overwhelmed with constant SMS and phone calls for booking, rescheduling, and cancellations, leading to delays and human error.

Customers faced slow response times and could only book appointments during limited business hours, causing frustration and missed opportunities.

  • Manually communicating the correct service location for a specific day was inefficient and often led to confusion, no-shows, and last-minute cancellations.

Without a unified system to track conversation history, staff lacked context, forcing customers to repeat information in subsequent interactions.

 
 

The Solution

We created an intelligent SMS agent in n8n using Google Gemini that understands natural language to book, find, reschedule, and cancel appointments.

The agent uses Cal.com’s API through HTTP nodes to check live availability, select suitable time slots based on duration, and instantly confirm bookings.

  • The agent uses a Google Sheets lookup tool to instantly fetch up-to-date addresses and operating hours, ensuring customers get accurate info.

The agent uses a real-time Google Sheets lookup tool to give customers the correct address and opening hours for any day.

Results

24/7 availability for customer interactions

40% increase in booking conversion rates

95% automation of appointment scheduling

Key Features

Twilio

Twilio powers the WhatsApp communication layer in this bot, giving a reliable, officially supported way to send and receive WhatsApp messages at scale. 

AI Scheduling Intelligence

The AI agent uses conversation memory to understand booking intent across multi-turn WhatsApp chats, then dynamically calls Cal.com API to check availability, create bookings, or reschedule appointments based on customer preferences.

Cal.com

Cal.com serves as the centralized scheduling hub where all WhatsApp-booked appointments are automatically created, organized, and managed in real-time.

Instant Booking Confirmation

the workflow automatically sends a personalized WhatsApp confirmation message with complete booking details

Smart Rescheduling

The AI agent understands natural reschedule requests, checks Cal.com availability for the new time slot, confirms it’s open, and asks for customer confirmation.

Instant Cancel

The automated WhatsApp confirmation workflow demonstrates real-time appointment cancellation handling.

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