Most no-shows just forgot.
They booked in good faith two weeks ago, and life happened. An empty slot costs you the whole appointment, and scolding customers wins nothing. Reminders fix forgetting, and forgetting is most of the problem.
Use a two-touch reminder: the night before, and an hour before.
The night-before message catches the diary clash while there is still time to rebook the slot. The hour-before message catches the day running away. Both end with one line: reply here to change it.
Make changing the time easier than skipping it.
A customer who can rebook with one reply gives you the slot back. A customer who has to call and apologise often just does not show. Never make someone feel bad on the way to giving you money.
Watch a booking confirm itself, reminder included.
In the live demo the customer picks their own slot, it lands on the real calendar, and the reminder is queued without anyone touching a phone.
The done-for-you version sends every reminder, every time.
SynKasa books the appointment, confirms it, sends the reminders in your voice, and handles the reply that says Tuesday broke. The slot gets rebooked instead of lost.
Count last month's empty slots.
Each one was a full appointment you had already won. The fit form takes two minutes and routes you to the right tier.