Provide the theme summaries for the following conversation: 

Nelly: Hello :-)
Allie: Hi :-)
Nelly: I saw you with the book at the lecture. Where did you get it?
Allie: Our library.
Nelly: It must have been the last. I was there today and all of them were borrowed.
Allie: Bad luck.
Nelly: Will you be using it all the time?
Allie: I think so.
Nelly: Ok. I'll try somewhere else.

Summary: 
Allie got hold of a book which is much craved for at the university library. She refuses to share it with Nelly.