Wh-who said I was flustered?

[She is though. But despite her grumbling she is glad that he is giving up the book with a minimum of fuss.]

Thank you. Better get this back to the library then.

[She turns to leave but then a thought occurs to her and she turns back with a smile that is obviously forced and a tone that is very carefully polite.]

Oh, um, would you mind if I asked for your name, Sir?

[So she knows which teacher's classes to never, ever take.]