Reply of Thank you

A: Would you like to help me to bring these books?
B: Of course.
A: Well, thank you.
B: You're welcome.

What B said is an ordinary answer. Besides you're welcome there are several alternative to reply, such as

1. That's alright.
2. Not at all.
3. Don't mention it.
4. It's a pleasure.
5. Friendly smile.

For number 1-4, you can say it. But for number 5, friendly smile, just do it.
Just try it,,,