answer: #Person1# is surprised that #Person2# likes the old styles of dance. #Person2# advises #Person1# to ask Lily who likes modern dance.
documents: #Person1#: I know you are a good dancer. What dances do you like?
  #Person2#: I like the old styles of dance. Such as fox-trot, waltz, rumba, tango and so on. They're all graceful.
  #Person1#: Why do you like old styles of dance?
  #Person2#: Why not? Do you think I should like modern dance?
  #Person1#: I think so, because most young people like modern dances, such as rock and roll.
  #Person2#: Oh, sorry. I don't like them. Why not ask Lily. She likes modern dance.
  #Person1#: OK, I will. Thank you.