dialogue: Lily: Professor Davis, could you please borrow me the book you talked about on your last lecture? There is only one copy of it in the library and someone has already borrowed it.
  Charlie: Hello, Lily! I am afraid I cannot help you - I do not own a copy of this book, I borrowed it form professor Roberts myself.
  Lily: Thank you, I will ask professor Roberts than.
  Charlie: Lily, have you submitted your paper? I cannot find it.
  Lily: Yes, I have or at least I think I have. I will check it.
  Lily: Professor Davis, I am so sorry, I was certain that I have done this. Could I submit my paper now?
  Charlie: Yes, of course. :)
  Lily: Thank you!
  Lily: <file_other>
  Charlie: You are welcome! Could you please remind your classmates to do the same? So far I have received only ten papers..
  Lily: Yes, of course, I will do this.
  Charlie: Thank you, Lily! By the way I have already read your paper. It is very well written and you made some really good points - it is an A+ work! :)
  Lily: Thank you, Professor Davis! And once again thank you letting me submit it after the deadline.
  Charlie: It is not a big deal. :) Nevertheless I would be really glad, if the rest of the students sent their papers to me soon.
summary: Lily asks her professor to borrow her a book he recommended, but he doesn't have a copy. He reminds her to submit her paper she thought she submitted. Lily gets A+ and Charlie asks her to remind other students to submit their work.