answer: #Person1# will join the company's Christmas party because #Person1#, a newcomer, can know people from the other departments of their company. #Person2# tells #Person1# it's an informal party and #Person1# can dress casually.
documents: #Person1#: Have you signed up to join the company's Christmas party?
  #Person2#: Sure, I have. Will you join?
  #Person1#: I will. You know, as a newcomer, I think it might be a good opportunity to get to know people from the other departments of our company in a more relaxed atmosphere.
  #Person2#: You are right. Our company's Christmas party has always been an amazing occasion for everybody to relax and get to know each other better. It is also a time to make new friends and do some networking.
  #Person1#: I hope that it is not a formal one when the boss is there.
  #Person2#: No, it will not be formal at all. It is a fun time. You will love the game show. Please dress casually. Usually there is an over abandon of drinks, so be careful with that.
  #Person1#: Don't worry, I can handle that. And I know if the boss is there, even it is an informal evening, it does not make a good impression to get totally drunk in front of him.