answer: #Person1# books 4 seats for hamlet for Saturday, October 21st, with #Person2#'s assistance.
documents: #Person1#: I like to book a few seats for hamlet, please.
  #Person2#: Yes, sir.
  #Person1#: Have you got any seats downstairs?
  #Person2#: Yes, we have.
  #Person1#: How much are they?
  #Person2#: $3.75 each.
  #Person1#: Are there any seats for $2.5?
  #Person2#: Yes, there are. Upstairs. How many?
  #Person1#: 4 please.
  #Person2#: For which night?
  #Person1#: What about Saturday October twenty first?
  #Person2#: I can give you 4 seats in row 8.
  #Person1#: How long will the performance last?
  #Person2#: 2 1/2 hours.
  #Person1#: Thank you. How much will that be in all?