A dialogue between myself and a book seller about buying a book

Me: Good morning.

Bookseller: Good morning! How can I assist you, sir?

Me: I want to purchase a grammar book.

Bookseller: Sure, here are some books. You can pick one from these.

Me: Oh, I'm looking for the best option.

Bookseller: How about the Advanced Learners Grammar and Composition?

Me: Is that the top choice?

Bookseller: Yes, it's a really good grammar book.

Me: Let me take a look.

Bookseller: Here it is.

Me: This does seem like an excellent grammar book. I've been searching for something like this. I'll take it.

Bookseller: It's a bit expensive, though.

Me: That's okay, I have the money right here.

Bookseller: Thank you.

Me: You're welcome.