Zoho Bookings - variable appointments

Hello,

I am looking to see if its possible for zoho bookings to recognise booking slots in the calendar or a way to do this.

I would like appointments only booked in at certain times of the day and this could vary per host.

I have provided a calendar screenshot which shows 'placeholder' where i want the appointment to be.

Certain Host's have existing meetings which a recurring weekly/monthly and only want new appointments to go in at certain times/days