In Bookings, you can set up reminder emails that will be sent to students before their appointments.
Open your Bookings calendar by signing in to bookings.office.com.
Click Services in the left menu.
Click the Edit icon next to the appropriate service in your list.
Note: You will need to update all services in your list one by one since they each have their own email confirmations.
Scroll down to the Reminders and Confirmations section. Make sure you have one (or more) reminders setup here for the student. Even something simple like... “Just a quick reminder! Your appointment is coming up soon.” will work.
If you need to add one, click Add an email reminder.