answer: #Person1# needs to get to Cambridge and decides to go there by train since it's much faster. #Person2# shows #Person1# the way to Kings Cross Station where #Person1# can catch the train.
documents: #Person1#: Excuse me. I need to get to Cambridge today.
  #Person2#: Would you like to go by train or by bus?
  #Person1#: I am not sure. Which one is better?
  #Person2#: The bus is cheaper, but also slower. It will take about 2 and half hours.
  #Person1#: And how long does the train take?
  #Person2#: If you take the fast train, it will take about 50 minutes.
  #Person1#: Where do I catch the train?
  #Person2#: The trains for Cambridge leave from Kings Cross Station. They run every half hour. Most trains to Cambridge go from platform 9.
  #Person1#: How do I get to Kings Cross Station?
  #Person2#: The best way is to take an underground train directly to Kings Cross Station. The underground station is just round the corner from here.
  #Person1#: Can you show me on the map?
  #Person2#: Just turn right when you leave, and then turn right again at the first crossroads. The entrance to the underground station is about 50 meters further on.
  #Person1#: Thank you very much.