If you wish to receive less or more bookings on a particular date or time, go to your Calendar and click on the schedule that you want to edit. Click on the 'Edit Capacities' button.
This will show the capacities that you have for your regular bookings and promotional bookings.
Choose which capacity that you want to change then click on the up or down button on the right side of the screen to adjust them accordingly. Click on the 'Update' button to save the changes that you have made.
Please note that when you change the capacity for your regular bookings, your promotional bookings will also be changed since they are based-off your regular bookings.