answer: Jane refuses #Person1#'s invitation to dance because she won't go to the party.
documents: #Person1#: Jane, pleases come with us.
  #Person2#: I cannot dance, you know. I have't such a talent.
  #Person1#: Just for fun, not for showing. What do you worry about?
  #Person2#: Nothing. I have told you before that I won't go to the party and that's flat.
  #Person1#: But. . . OK.