Check in request

I am intested in the following for paid accounts.
The ability for patients to text or email to check in to the appointments.
Once done, then they will be listed as waiting.
But they actually wont be ‘waiting’ in the ‘waiting room’.
When I am ready to see them, I click on them in the waiting room and it notifies them I am ready to see them.
While ‘not in the waiting’ room they can use their device for other things and this won’t mess up the camera and mic which is my experience. They can also do a pretest call.
It will also allow a ‘walk’ in type experience - like ‘take’ a number or ‘get in line’.
Just an idea.