When you need to make changes to your availability, you can cancel appointments on your calendar. If you no longer wish to use an existing appointment schedule, you can delete it.
Cancel a booked appointment
Important: When you cancel a booked appointment:
- The appointment is removed from your calendar.
- A cancellation email is sent to the person who booked the appointment.
- The canceled appointment time appears available on your booking page.
- On your computer, open the booked appointment on Google Calendar.
    - To cancel a third-party calendar appointment, use the link in your confirmation email or decline the calendar invitation.
 
- Click Cancel appointment.
- On the booking page that opens, click Cancel your appointment.
Tip: If you or the person who booked an appointment with you forwards the appointment confirmation email to someone, the recipient can cancel the booked appointment.
Delete an appointment schedule
Important: When you delete an appointment schedule:
- The appointment schedule is removed from your calendar.
- Booked appointments stay on your calendar and the person’s calendar who booked the appointment.
- Links to booking pages you shared no longer work.
- On a computer, open Google Calendar.
- Click the appointment schedule you want to delete.
- At the top right, in the appointment window, click Delete appointment schedule . 
Tip: To make changes to your appointment schedule, like removing a time block, edit the appointment schedule.