A reminder text goes out. Someone still can't make it, so they ring, and reception spends five minutes finding a new slot and reading it back down the phone.
Multiply that across a day of cancellations and it's a real chunk of someone's time. And it compounds quietly: a freed-up slot that isn't refilled fast usually just sits empty until the appointment itself, so the cost isn't one missed booking, it's that same empty slot repeating every time nobody's watching for it.
Let a reply like 'can't make it' or 'can I move to Thursday' get handled by text against the diary, and route a freed slot straight to whoever's already waiting for exactly that gap.
Imagine cancellations rebooking themselves by text, and freed slots going straight to the waiting list instead of sitting empty. Reception's time goes back to people, not phone-tag admin.
There's an example of this here.
See exactly how cancel-and-rebook by text works, step by step.
See the example