answer: #Person2# cannot meet #Person1# this Saturday because #Person2# volunteers at the children's hospital.
documents: #Person1#: Want to meet for lunch this Saturday? 
  #Person2#: Sorry, I can't. I am busy. 
  #Person1#: What are you doing? 
  #Person2#: I always do volunteer work on the first Saturday of every month. 
  #Person1#: What kind of volunteer work? 
  #Person2#: I help out at the children's hospital. I help plan activities. 
  #Person1#: Oh, yeah? 
  #Person2#: Yes, it's exciting. This month we are doing crossword puzzles.