Coach approval required for bookings

Can we set up the booking system so that the coach (or person in charge) must first approve every session that clients book? The session will only be confirmed once the coach has approved it.

This is very useful for personal training sessions but might not be ideal for group sessions where multiple people will book a single session.

Therefore, you could perhaps implement this as an option when setting up the product/service. For group classes, for example, you could also set a minimum number of participants before the session takes place.