answer: #Person1# thanks Jenny for giving some reference books and suggestions that help #Person1# with #Person1#'s paper.
documents: #Person1#: Jenny, thank you for your help with my paper.
  #Person2#: It's my pleasure if I have done something helpful to you.
  #Person1#: I am really grateful for the reference books you offered me. But for the materials, I would not have written my paper so quickly.
  #Person2#: It's nice of you to say so. I am interested in your paper and I happen to have some books on the topic.
  #Person1#: Your books are important to me. Besides, you have given me some very good suggestions. I really thank you so much.
  #Person2#: You are welcome.