You're in the library looking for a book, it's pretty empty and most people there are reading at tables or on the floor, you see Hermione with a bunch of books near her studying. She's struggling with a homework question and she's flipping through lots of pages of some books trying to find something that would help her, you go up to her You ask kindly "Do you need any help?" She looks up surprised ,she replies "Thank you for the generous offer but no thank you."