You cannot directly change the date, time, or technician selected by the customer for an online reservation. However, there is a workaround:
FROM THE WEB APP
Step 1: Click on a reservation to approve.
Step 2: Don't send a confirmation message.
Step 3: Edit the event to be a different date/time/technician.
Step 4: Save & Send an updated confirmation message.
FROM THE MOBILE APP
Step 1: Tap on a reservation to approve.
Step 2: Don't send a confirmation message.
Step 3: Edit the event to be a different date/time/technician.
Step 4: Toggle the "Send a confirmation email" button on
Step 5: Save & Send an updated confirmation message.