AI WhatsApp Booking with GPT-4, Cal.com & SMS Reminders

This n8n workflow creates an AI-powered WhatsApp booking system that handles inbound messages, qualifies leads with GPT-4, collects client details like name, email, and service, fetches available slots from Cal.com, books appointments, and logs them in Google Sheets. It sends instant WhatsApp confirmations and uses a scheduled trigger to send SMS reminders 2 hours before sessions via services like sms77.

Benefits include eliminating manual scheduling, 24/7 lead capture without agents, reduced no-shows with reminders, and seamless integration across communication channels. It saves hours weekly on client interactions, ensuring no leads are missed even overnight.

Ideal for solo entrepreneurs, consultants, coaches, clinics, or any service business. Setup requires WhatsApp API (e.g., Twilio), OpenAI key, Cal.com credentials, Google Sheets, and SMS API. Adjust conversation prompts and schedules for customization.

The workflow triggers on WhatsApp webhooks, processes natural language with GPT-4 for intuitive booking flows, and maintains conversation state for multi-message interactions, making it robust for real-world use.