Navigate to Scheduling >> Patient Scheduling.
After that navigate to Patient Scheduling or Scheduling by Clinician.
In Patient Scheduling and Scheduling by Clinician only the appointment view changes. The functionality remains same.
Following steps are applicable to both Patient Scheduling and Scheduling by Clinician.
Select the desired office from the drop box located at the top.
Right Click and click Delete on the appointment that has to be deleted.
A Pop Up window will open asking for confirmation. Select desired option and click "Yes" to Delete the appointment.