Quick appointments while I'm in a meeting

It would be so great if, in some places where you have an appointment and have to wait, you could schedule a quick appointment.

For example, teeth whitening takes about 60 minutes—I have a 15-minute consultation, and for the remaining 45 minutes, I just sit there.

So that when you click on teeth whitening, it shows 60 minutes for the appointment, but in my calendar it only shows 15 minutes.

Customers should have access to this feature as well.