Booking features are available in Optimaze Worksense Book and Flow plans, see all the plans here.
There are two different types of bookings: 1) bookings that are managed in Optimaze Worksense and 2) bookings that use an integration to 3rd party booking system such as O365 or Google G Suite.
Both type of bookings can be used together or separately. For more information see individual pages of the features.