I use Calendly to schedule language testing appointments. Basically, I need to be 1:1 with the student for the first 15-30 minutes. Then, they are on their own for a written test. I want them to book an appointment for 1 hour and 15 minutes so they know how long it will take, but I want to move onto doing other 1:1s while they are doing the written test. 

Right now, I have it set up in Free/busy rules to allow students to “book over” other appointments. But, sometimes I end up with three people arriving at 9:00 (until 10:15). I instead want only one 9:00 option bookable, with the next option being 9:30, not 10:45. This is what happened before I started the “book over” setting, so I was sitting there with dead time waiting for the next appointment.

Is there another or better way to adjust the settings? I essentially want the booking page to look like:

9:00-10:15

9:30-10:45

10:00-11:15

10:30-11:45 …. and so on

I know as a workaround I can add an event that can’t be booked over after so there’s not future bookings, but I send the invitation out to multiple people at a time so I can’t stay on top of that.