Nice to see you.

A: 어서 오세요. Come on in.
B: 반갑습니다. Nice to see you.

A: 앉으세요. Please have a seat.
B: 고맙습니다. Thank you.

A: 커피 드시겠어요? would you like some coffee?
B: 네, 고맙습니다. Yes, thank you.

A: 설탕 넣으세요? Put sugar in it?
B: 네, 항 게요. Yes, 1 spoon please.

Learn how to read in Korean here.