answer: #Person2#'s sister and #Person2#'s neighbor Don can't come to dinner tonight, which makes #Person1# unhappy because he hopes to have some company.
documents: #Person1#: Hey, is your sister coming to dinner tonight?
  #Person2#: No, she can make it tonight. She has to work late on Fridays.
  #Person1#: Well, did you invite our neighbor Don?
  #Person2#: Nope, he's out of town this week.
  #Person1#: So does that mean it's just us for dinner?
  #Person2#: Yeah. Is that a problem?
  #Person1#: No, it's just that we always have dinner together. I was hoping that we could have some company for once.
  #Person2#: Well, I'm sorry to let you down. But I did make pizza, so I hope you can at least appreciate that.