Which of the following did the man agree to do?

W: Bill, is that really you? I haven' t seen you for months.
M: Hello, Christina. Yes, it has been a long time. Good to see you. How have you been?
W: I' ve been okay. I' ve just been so busy with school. We really should get together and catch up. How about joining me for dinner tonight?
M: I' d love to, but I' m taking off for Miami at 8:00 tonight if everything goes well. I' m going home because my brother is getting married on Saturday morning.
W: That' s great. Congratulations! I hope that you have a nice time at home. You’ ll just have to take a rain check on that dinner invitation.
M: Well, what are you doing now? Maybe we can go to the coffee shop and chat for a while. There is an attractive, little place I know of down the street.
W: I really wish I could, but I' m on my way to the tennis courts.
M: Tennis courts? I didn't know you could play tennis.
W: It sounds like that, but actually I can' t. I' m taking lessons so I can learn. My roommate is on the tennis team and she' s gotten me interest-ed in the sport. Do you know how to play?
M: A little, but I haven' t played for years. I really like the game, though.
When I come back from my trip, I think I’ ll join you in taking lessons.
W: It' s a deal. Just give me a call when you get back.
M: You got it.