Schedule Module - How to Assist Customers with Booking a Class
Suppose the administrator needs to assist customer "Emma" in booking the "Stretching and Flexibility Training class taught by Norma at 3:00 PM on 5/8."
Before making a reservation, it’s recommended that administrators confirm with the customer which pass they wish to use. If you want to allow students to book first and pay later, you can select "Unpaid Class" when assisting with the reservation. Once the student purchases a pass later, you can link it to the reservation.
Note: Customers can still change the pass used for the reservation later. 
Schedule Module - How to Assist Customers with Booking Schedule Courses
Assuming instructor Amelia has offered a course "myofascial relaxation", and customer Amy is a regular attendee. The admin can assist customer Amy in booking all scheduled classes for this course (adding the customer to the attendee list for this course). After the admin assists with the reservation, customers can directly view upcoming classes in the inbox "Upcoming Classes", they don't need to book class one-by-one.
Note: Customers can still change the pass used for the reservation by themselves afterward. (Refer to this article below "How Customers Can Change the Pass Used for a Reservation")
All Classes: The customer will be added to the attendance list for all past and future sessions of the course.
Upcoming Only: The customer will only be added to the attendance list for future sessions of the course.
Appointments Module - How to Assist Customers in Reserving from Available Time Slots
When you choose this way to assist customers with reservations, you can select multiple available time slots at once for bulk booking.
Appointments Module - How to Add Custom Time Slots for Customer Reservations
How Customers Can Change the Pass Used for a Reservation
