How to cancel a lesson that will happen within 24 hours?

On italki, cancellation or reschedule within 24h is not allowed. Each time slot of a teacher needs to be booked in advance and can only be booked once. 

If you can't take a lesson, make sure you're notifying your teacher at your earliest convenience. Talk with your teacher and see if a refund or rescheduling can be arranged. 

• Lessons that will happen within 24 hours can only be canceled or rescheduled by “report a problem” after lesson time, (How to report a lesson problem?)
• If your refund request is not agreed upon, your teacher is entitled to receive full payment.

Note that if both have agreed to "reschedule a lesson", the lesson can no longer be canceled but should proceed with a new date and time. Should there be further issues, you can report a problem again after the new lesson date and time.