Yes
Call em, they seem to be very friendly helpful people
I bet the extremely helpful staff there will help you with something out if you contact them.
Most likely, yes. Just give the box office a call and they'll help you out!
Probably need to call them.
I believe you have up until 24 hours before the show to change the tickets out. Your best bet is to call their office ASAP and ask them if there are shows/times available for 'trade'.
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