Monthly. Everyone who has not been in for twice their usual interval.
Find every client with no appointment for 90 days.
Message each one, mentioning the treatment they usually have.
Offer one clear reason to come back now, not a discount by default.
Note who replied so we do not message the same person next month.
These are instructions for the assistant, carried out one at a time against your real records. Each one still goes through the same checks as if you had asked for it yourself.
Once you have an account, ask for "Lapsed client win-back" and it is added as your own recipe. From then on it runs on your records, not on an example.
From the first message to the chair.
Run it the same day. A no-show contacted that day usually rebooks.
The single highest-value habit in the business.
Two days after a first appointment, which is when they decide if you are their place.
A cancellation an hour before is money unless this runs immediately.
For anything sold as a block of sessions.