Set up daily appointment reminders in n8n

Have n8n read today’s calendar entries, make reminder calls with Retell AI, and send a follow-up text through Twilio.

Done with n8n· Intermediate

What they did
They put together a scheduled n8n automation that starts each morning. It checks Google Calendar for the day’s bookings, then asks Retell AI to place a voice reminder to each customer. Once a brief pause passes, Twilio sends a tailored SMS after the call.
How it went
The workflow is presented as a hands-off way to keep reminders regular and save time. No usage totals, live test results, or breakdown of problems are included.
Tips
Add a checkpoint before any message is delivered so you can review the contact list first. If your calendar entries do not store phone numbers cleanly, plan a separate source for that data before relying on the flow.

Try it yourself with n8n

Create an n8n automation for [weekday or time] that looks up today’s events in [calendar name] on Google Calendar. For every appointment, have Retell AI place a reminder call using [call script], then after [delay] send a follow-up text through Twilio with [SMS text]. Pause before any call, text, submission, deletion, or payment action; show me the exact people involved and ask for approval before continuing. Run the first test only with [my number/test contact].

Fill in the [brackets]. Agents can make mistakes, so review anything before it is sent, paid or deleted.

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