answer: #Person1# helps #Person2# buy a one-way bus ticket to London. #Person2# finds that the price rises up.
documents: #Person1#: Good morning. What can I do for you?
  #Person2#: I'd like a ticket to London, please.
  #Person1#: Round trip?
  #Person2#: No, one-way.
  #Person1#: OK. That'll be twenty-two pounds.
  #Person2#: Twenty-two? Last time I took this bus, it was only twenty.
  #Person1#: I know. The rate went up this month.
  #Person2#: Just like everything else. Does the bus still leave at two fifteen?
  #Person1#: Two fifteen at Gate Eleven. You ought to be at the door by two, though. The driver usually begins loading fifteen minutes before the trip.
  #Person2#: OK. Thanks a lot.
  #Person1#: You are welcome. Have a good trip.