answer: Because #Person1# lost #Person1#'s homework, #Person2# asks #Person1# to make it up and reminds #Person1# not to do it again.
documents: #Person1#: Let me tell you what happened to my homework.
  #Person2#: OK, go ahead--what is the excuse THIS time?
  #Person1#: Actually, I did it, but then it got lost.
  #Person2#: Could you have gotten it done at another time?
  #Person1#: Yes, I could.
  #Person2#: You have never missed an assignment before--when will you be making this one up?
  #Person1#: I'll make it up early next week.
  #Person2#: That would work, but don't let it happen again.
  #Person1#: I'll try.
  #Person2#: That will solve it then. Let's work hard to not let it happen again.