answer: #Person2# is roasting coffee beans with a popcorn popper. #Person2# tells #Person1# this machine roasts the beans just right.
documents: #Person1#: What in the world is that smell?
  #Person2#: The aroma of roasting coffee beans.
  #Person1#: Smells like you're baking something. What are those?
  #Person2#: Green beans. They pop and turn brown when you roast them.
  #Person1#: Cool! But isn't that a hot air popcorn popper?
  #Person2#: This machine roasts the beans just right. If you roast them too long, or the temperature is too hot. . .
  #Person1#: The beans will burn. I know. I've tasted burnt coffee before. . . yuck!