answer: #Person1# invites #Person2# to dance. #Person2# refuses because #Person2# can't dance, then#Person1# teaches #Person2# how to dance.
documents: #Person1#: May I invite you to dance with me?
  #Person2#: Sorry, I can't dance.
  #Person1#: Never mind, I can teach you.
  #Person2#: Is it difficult to learn?
  #Person1#: No, it is easy.
  #Person2#: How should I do?
  #Person1#: You just follow me.
  #Person2#: All right. By the way, do you often dance?
  #Person1#: Yup, because dance can relax myself.
  #Person2#: It seems a good way.