I agree with Ms. Levy-Sisk. May need to speak with the box office staff directly. I recommend calling first. I'm sure they will be happy to help out. Those tickets should be more in-demand with all the Tony wins the show got.
They MIGHT. You'd need to stop by in person, though. Ususally the better a show is selling, the better chances you have of them allowing changes. So I'd say the odds in your favor.
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