AI-Powered Reservation Reminder Calls for Restaurant with Twilio & Grok-4

🤖📞 This workflow automates the process of calling customers to remind them of their booking reservations using AI-generated messages and a Twilio phone number. It can easily be adapted for other venues.

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Key Benefits

• Time-Saving Automation: Eliminates the need for manual calls by staff, saving hours per week.

• Human-like AI Messages: Uses a custom language model to generate polite, natural phone messages tailored to each customer.

• Multi-Channel Integration:

  • Google Sheets for reservation tracking.
  • Twilio for automated calling.
  • OpenRouter (or other LLMs) for generating speech content.

• Error Reduction: Ensures all customers receive reminders exactly on the reservation day, minimizing no-shows.

• Scalable: Easily adapts to growing reservation lists and more complex message logic.

• Suitable for restaurants, hairdressers, offices and any other business

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How It Works

1. Trigger:
   • The workflow can be triggered manually (via "When clicking ‘Execute workflow’) or automatically at 11 AM daily (via Schedule Trigger).
2. Data Fetch:
   • Retrieves today’s reservations from a Google Sheet, filtering rows where DATE = today and CALLED is empty.
3. AI-Generated Call Script:
   • For each reservation, the Secretary Agent (powered by OpenRouter’s Grok-4) generates a phone script using the guest’s name, time, and party size.
4. Twilio Call:
   • The script is sent to Twilio, which calls the guest’s phone number (from the sheet) and reads the message aloud using text-to-speech.
5. Update & Loop:
   • Marks the reservation as called (CALLED = "x") in the sheet and waits 2 minutes between calls to avoid rate limits.

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Set Up Steps

1. Twilio Configuration:
   • Sign up for Twilio, buy a phone number, and:
     • Enable text-to-speech (set language to Italian).
     • Configure geo permissions for the target country.
     • Add credentials to the Twilio node (sender number in From field).
2. Google Sheets Setup:
   • Clone the Google Sheet template and ensure:
     • Phone numbers include the international prefix (without "+").
     • Columns: DATE, TIME, NAME, N. PEOPLE, PHONE, CALLED.
3. OpenRouter API:
   • Connect the OpenRouter Chat Model node to your account (using Grok-4 or another model).
4. Deploy:
   • Activate the workflow and test with manual execution.

Note: The workflow is currently inactive (active: false). Enable it after setup.

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Need help customizing?

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