Remember that you stand a good chance of getting a seat if you join the rush line as soon as you can. You can sign up on the rush list (in the Hilson Lobby) from 6:15 pm onwards before each show. Hang around till 6:58 pm and then you will get first dibs on returned seats.
If you need to cancel your ticket, please, please be thoughtful and go back to your email confirmation to cancel the ticket. This way it will be re -released for others to snap up.