It’s very kind of you.
I’m much obliged to you.
Thank you very much.
Thank you very much indeed.
L: Hello! How may I help you?
S: Hi! I’m trying to find a few books, but I’m lost.
L: OK. What books do you need to find?
S: I need to find three English conversation books by Professor Brown.
L: All right. Those books are at the main desk on the third floor.
S: How do I get there?
L: Just take this elevator up two floors. The desk is right outside.
S: Great. Thank you very much!
L: You’re welcome. Good luck!