I understand from time to time you may not be able to take a class that you have pre-booked with me. Here is the Fuelled by Yoga Cancellation Policy.  

All class bookings are non refundable unless the instructor cancels the booking. In the case that the instructor cancels the class, the student will be fully refunded. If the student cancels the booking with more than 24 hours notice they are then able to reschedule the booking for a future date within two weeks, subject to my availability.  If it is less than 24 hours notice, a 50% class fee will be charged.  

Obviously I try to balance a business with being a human so if it is an emergency/one off it's highly likely I will waive this fee, especially if I haven't lost any business.  It's just for people who may have to frequently cancel and I have held an appointment spot open for them and am unable to fill it. 

Basically, I will try to accommodate you if I can!