answer: Anna decides to go out seeing a musical with #Person1# tomorrow since she is busy tonight.
documents: #Person1#: Say, Anna, what are you doing tonight? Would you like to go out?
  #Person2#: Oh, sorry, I can't. I'm going to work late tonight. I have to finish this report.
  #Person1#: Well, how about tomorrow night? Are you doing anything then?
  #Person2#: No, I'm not. What are you planning to do?
  #Person1#: I'm going to see a musical. Would you like to come?
  #Person2#: Sure, I'd love to! But let me pay for the tickets this time. It's my turn.
  #Person1#: All right! Thanks!