answer: #Person1# trades #Person1#'s aisle seat with #Person2#'s window seat. #Person2# tells #Person1# where to put luggage and reminds #Person1# to keep the seat belt on.
documents: #Person1#: finally we're on board! 
  #Person2#: yes. It was so crowded. I'm worn-out. Let's find our seats. 
  #Person1#: are they window seats or aisle seats? 
  #Person2#: let me see... yes, one window seat and one aisle seat. 
  #Person1#: ok. But can I trade my seat with you? I prefer the one near the window. I'm a terrible flyer. I always get airsick and can never relax until after I've landed. 
  #Person2#: that's fine. I'd like to be on the aisle anyway. It's easier to get in and out. 
  #Person1#: thanks. Where shall we put our luggage? 
  #Person2#: I think the smaller carry-on bag can go in the overhead compartment, and the others can go under the seat. 
  #Person1#: good idea. 
  #Person2#: don't forget to keep the seat belt on. 
  #Person1#: ok. Hope it's a pleasant trip. 
  #Person2#: yes! 
  #Person1#: and no hijackers. 
  #Person2#: oh, you have too wild of an imagination.