answer: #Person2# is responding to Sue's letter, while #Person1# wants to add #Person1#'s promotion news to the letter. #Person2# congratulates #Person1#. Then they finish the letter with thanks to Sue's kindness and appreciation for the Christmas package.
documents: #Person1#: who are you writing a letter to?
  #Person2#: I'm just responding to Sue's letter. Do you want to help?
  #Person1#: OK. I guess I could add something. Tell them that I send my love.
  #Person2#: that's kind of boring. Don't you want to tell them anything else?
  #Person1#: well, maybe you could tell them about my promotion.
  #Person2#: you've been promoted? when did that happen?
  #Person1#: just today. I guess I forgot to mention it.
  #Person2#: congratulations! That's really exciting! Let's get out a bottle of wine to celebrate!
  #Person1#: shouldn't we finish writing this letter first?
  #Person2#: ah. That can wait. Your promotion is the best news I've heard in a long time!
  #Person1#: it is good news, but it looked like you were almost finished. We might as well just sign off.
  #Person2#: ok, you're right. I'll just tell them how round I am of you for getting a promotion and then I'll thank Sue for her kind letter.
  #Person1#: I guess you can write that I'm looking forward to seeing them in June.
  #Person2#: that's thoughtful of you.
  #Person1#: and also thank them from the bottom of my heart for the Christmas package they sent us.
  #Person2#: that's right! I almost forgot about that.
  #Person1#: what would you do without me?
  #Person2#: we do balance each other out well. I guess we were really made for each other!