answer: #Person2# wants a round ticket to Pakistan on CA and agrees to be on the waiting list as #Person1# says the flight on Nov. 21st is full.
documents: #Person1#: May I help you?
  #Person2#: Yes. I would like a ticket to Pakistan on CA.
  #Person1#: Is that a one-way or round trip?
  #Person2#: Round trip, please.
  #Person1#: When would you want to leave?
  #Person2#: I'd like to leave on Nov. 2nd and return on Nov. 21st.
  #Person1#: I am sorry. The flight on Nov. 21st is full. Do you mind if I put your name on the waiting list?
  #Person2#: Yes, please. Thank you.