Reduce No-Show Appointments: OpenAI + Twilio SMS w/ n8n

Reduce no-show appointments with OpenAI-powered SMS reminders sent via Twilio (using n8n)

This n8n workflow analyzes each booking for no-show risk, uses OpenAI to draft a tailored SMS only for high-risk appointments, and sends it through Twilio—then logs everything to Google Sheets and returns a clear JSON status summary.

What this workflow does

• Receives appointment data via a POST webhook or runs on a daily schedule at 7:00 to process upcoming appointments.
• Normalizes booking fields (customer, appointment details, history, and metadata) into a consistent schema for scoring and messaging.
• Calculates a weighted no-show risk score in Python, including a recommended action based on customer history and appointment attributes.
• Sends only high-risk appointments to OpenAI to generate a structured SMS reminder/confirmation message.
• Extracts the SMS body from the AI response, queues it, and waits for a configured send-time buffer.
• Sends the SMS via Twilio Messages API and logs scored appointment details to a Google Sheets tracker.
• Returns a JSON summary to the webhook caller (risk tier, score, and send status).

Use cases

• Healthcare, salons, or service businesses that want fewer missed appointments by targeting reminders only where risk is highest.
• SaaS operators managing high volumes of scheduled bookings and needing automated no-show prevention without manual outreach.
• Automation engineers building an OpenAI + Twilio SMS reminder pipeline with audit-friendly logging to Google Sheets.

Technical details

• Integrations: OpenAI (AI reminder generation), Twilio (SMS sending), Google Sheets (tracking/logging).
• n8n nodes used: webhook, filter, set, code (Python scoring), wait (send-time buffer), sticky note (workflow documentation).
• Setup requirements: add OpenAI credentials, configure Twilio HTTP Basic Auth with your ACCOUNT_SID and FROM number, and provide Google Sheets OAuth2 credentials with a sheet named NoShowTracker using matching columns.