AI voice reminder calls before Calendly meetings to cut no-shows

Build me an agent workflow that runs on a cron every 15 minutes and places AI voice reminder calls before upcoming Calendly meetings so we cut no-show rates on demos and consults.

On each run, use the Calendly List Scheduled Events operation to fetch events that start in the next 15 to 30 minutes. For every event, call Calendly List Event Invitees to grab each invitee's name, phone number, timezone, and the event's join link and topic. Skip anyone without a phone number and anyone whose event has an opt-out custom field set (something like a Do not call me question on the intake form).

For every remaining invitee, build a short reminder script that includes the host name, the event topic, the join link, the meeting time in the invitee's local time, and the phrase 'reply with reschedule if you can't make it.' Then place the call through LiveKit: use Create Room to spin up a fresh room named after the event and invitee, use Create Agent Dispatch to attach our reminder voice agent to that room, and use Create SIP Participant on our outbound trunk to dial the invitee's phone number and join them to the room.

Based on how the call goes, pick one of three outcomes and act on it. If the invitee confirms, use Slack Send a Message to DM the account owner (or post in a configurable team channel) 'attendance confirmed' with the invitee name and meeting time. If the invitee declines or asks to reschedule, use Calendly Mark Invitee as No-Show on that invitee and Slack a follow-up alert so a human can reach out. If the call goes to voicemail or nobody answers, have the voice agent leave a short voicemail with the join link and meeting time, then Slack a lightweight nudge so the host knows to expect maybe a late arrival.

Nuance to bake in: only dial between 8am and 8pm in the invitee's local time, dedupe against invitees already called in this run cycle, and never call the same invitee twice for the same event across runs (keep a small in-workflow record of which event+invitee pairs we've already dialed). If Calendly's opt-out field is set on any invitee, skip that invitee silently. Keep the Slack channel/DM destination, the reminder window, the quiet-hours range, and the reminder script phrasing all configurable at the top of the workflow.

Integrations to use: Calendly (List Scheduled Events, List Event Invitees, Mark Invitee as No-Show), LiveKit (Create Room, Create Agent Dispatch, Create SIP Participant), and Slack (Send a Message). Trigger: cron every 15 minutes.