answer: #Person1# buys a bus ticket to Boston with #Person2#'s assistance.
documents: #Person1#: Excuse me. What time does the next bus for Boston leave?
  #Person2#: It leaves at 8: 30.
  #Person1#: I see. Are there any seats available?
  #Person2#: Just a moment, please. Yes, you can have a seat.
  #Person1#: Good. How much is a one-way ticket?
  #Person2#: It's 38 dollars.
  #Person1#: All right. Here's 40 dollars.
  #Person2#: Here's your ticket and change.
  #Person1#: Thank you. Which gate should I go to for the bus?
  #Person2#: Go to gate number 2, please.
  #Person1#: Thank you very much.
  #Person2#: Don't mention it.