You're not helping

Customer: Can you order books?
Me: Yes.
Customer: I guess I have to tell you the name of the book.
Me: That's usually helpful yes.
Customer: It's published by Little Brown.
Me: Okay.
Customer: It's like $22.
Me: Okay. Do you know the title?
Customer: It's Blue.
Me: Okay. Do you happen to know the title?
Customer: The author is Wallace I think.
Me: Okay, I can try to search by author for you.
Customer: It's called Infinite Jest.



This was one of those nice enough but clueless exchanges. Why couldn't she just give me the title to begin with?