answer: Steven tells Tom he is tired because of work. Steven will buy a new air conditioner for his parents.
documents: #Person1#: Hello, Tom!
  #Person2#: Hello, Steven!
  #Person1#: How are you doing?
  #Person2#: Not bad. What about you?
  #Person1#: I'm just a little tired.
  #Person2#: Why?
  #Person1#: I have a lot of work to do in the company recently.
  #Person2#: How is your family?
  #Person1#: Pretty fine, thanks.
  #Person2#: Where are you going now?
  #Person1#: I am going to buy a new air conditioner for my parents. Oh, it's two o'clock. I must go now.
  #Person2#: OK, see you next time.
  #Person1#: See you.