answer: #Person1# asks #Person2# to double the recipe since #Person1# invited Bob, an old friend who saved #Person1#'s life one time, for dinner.
documents: #Person1#: Hi, I'm home! Can you double that recipe? I ran into an old friend after work and invited him for dinner.
  #Person2#: No problem. Who is it? Anyone I know?
  #Person1#: I don't think so. Do you remember Bob Gain from Tulsa?
  #Person2#: That name doesn't ring a bell. But tell me more.
  #Person1#: He was on the diving team with me in high school and saved my life one day.
  #Person2#: Well, I'll have to personally thank him by making him my famous chocolate cake.
  #Person1#: You're glad he saved me, huh?
  #Person2#: Absolutely! Bob and his whole family are welcome here any time!