This way of setting schedules appointment type to anyone who is available at the time that guest has picked. If multiple host are available at a same time, meeting is assigned in round robin manner.

Step 1: Go to Appointment Booking Page and Click on "Manage Appointment Types" on Booking Page of your choice.

Step 2: Click on create an Appointment Type and Select "Automatic" in how to set available times

Create Appointment Type
Select Meeting Appointment Type

Step 3 : Once Appointment Type is created click on "Change hosts" and add your colleagues as hosts.

Step 4: In "People can propose meetings...", select "When any required host is available".

Add multiple hosts

Step 5: Change availabile times you wish to offer by clicking on "change hours"

Step 6: If you wish to make changes in other preferences such as duration, location, reminders and questions that are asked to your guest, you can do so by clicking on "Edit Appointment Type"

Make sure you click on "Save Appointment Type" after making changes.