Read the following dialog and answer the questions.

Dewi: Is everything all right, darling?

Dewa: No, I'm afraid it isn't. They want me to work over the weekend.

Dewi: Work over the weekend? Oh, I can't believe it.

Dewa: You know I am planning a nice barbeque for us tomorrow.

Dewi: It's OK. Your work is more important. By the way, I want to send an email to the Gunawans. I want to thank them for the dinner.

Dewa: Why don't you call them? Here people always use a cellphone.

Dewi: Well, OK. How about inviting them to the barbeque?

Dewa: That's a good idea, but not tomorrow. I think next weekend is better.

Dewi: I agree with you. Please invite Mrs. Gunawan. I want my mother to meet her.

Dewa: What about Mr. Gunawan? Don't you like him?

Dewi: He's impossible

Dewa: Please be nice to him. OK, I have to leave now. Wish me luck.

Dewi: See you tomorrow. I love you.

Dewa: So do l. Take care.

Why did they cancel their plan to have a barbeque?