answer: #Person1# buys two tickets of a folk concert from #Person2#. The seats are in the back.
documents: #Person1#: Can I help you?
  #Person2#: Yes, would you like to tell me what's playing for tonight?
  #Person1#: Sure. There is a folk concert tonight.
  #Person2#: Are there any good seats left?
  #Person1#: Sorry. There are only some seats in the back.
  #Person2#: Well, what time does it begin?
  #Person1#: It begins at 7 p. m. .
  #Person2#: OK. I see.
  #Person1#: How many tickets do you want?
  #Person2#: Just two.
  #Person1#: OK. Fifty yuan for each.
  #Person2#: Here is the money.