Cut no-shows with automated reminders

A physiotherapy clinic keeps losing booked slots to no-shows — patients who meant to come, forgot, and never called to cancel, leaving a paid slot empty that a waiting patient could have filled instead. A phone call reminder from the front desk only catches whoever happens to pick up before they've already made other plans for that time.

Appointment booking and reminders close that gap from both ends. A patient books through a native in-chat form that checks real availability before confirming, so double-booking isn't possible, and an automated reminder goes out a set time before the visit with confirm, reschedule, or cancel buttons right in the message — turning a maybe-no-show into a freed-up slot early enough to refill it.

Reminder templates for appointments are categorised as utility, not marketing — they confirm a transaction the patient already agreed to, they don't promote anything new. This matters because a template that drifts into promotional territory (adding an unrelated offer, say) gets recategorised by Meta and then throttled, which can delay or block the very reminders meant to prevent no-shows in the first place. Keeping the reminder strictly transactional — time, location, confirm/reschedule/cancel — is what keeps it eligible for utility treatment.

Availability has to be checked atomically at the exact moment of confirmation, not just when the form first displays open slots. A slot that looked free when the patient opened the form ten seconds ago can already be taken by someone else who confirmed faster; without an atomic check-and-lock at confirmation time, both patients see a successful booking message for the same appointment, and the clinic only discovers the conflict when both walk in.

The reschedule and cancel buttons inside a reminder are only useful if they write back to the actual scheduling system, not just the chat's internal record of what happened. A cancellation that updates the chat state but not the calendar leaves the slot showing as booked to everyone else — the front desk, the waiting-list patient, the next reminder job — even though the original patient has already said they're not coming. The calendar has to be the single source of truth every response writes back to.