answer: #Person1# asks the means of transport to Chinatown and #Person2# introduces and suggests the express.
documents: #Person1#: Sir is this the right subway for Chinatown?
  #Person2#: Yes, you get off at Brown Street, cross it to reach Green Street, walk along Green Street and turn into Canal Street at the first crossing. Chinatown is right there.
  #Person1#: Shall I take the expresser local train?
  #Person2#: Take the express, the price is the same, but it saves you a lot of time. The local train stops at every station.
  #Person1#: How much is the fair?
  #Person2#: $1 for the entire line. You should pay 30 cents to get off here.