Read the following dialogues. What is the relationship between the speakers? Justify your answer. Point out the formal and informal expressions used in these dialogues.
A: Thank you very much for the beautiful book, Mr. Smith. It was very nice of you to remember my birthday B: It was the least I could do. I hope you enjoy it.
I: The flowers are gorgeous! Thanks a lot, Bob! K: Don't mention it. Happy anniversary!
T: How about a movie tonight? V: Sounds great!
C: I would like to invite you to dinner at the new restaurant. D: Thank you very much.
