What’s the relationship between the two speakers?

M: What are you going to have?
W: I have no idea. Could you help me with the menu?
M: Yes, sure. These are starters, and these are main courses and these are desserts. See?
W: What’s the alternative?
M: The alternative is to order a complete dinner. For a set price you get your choice of soup or juice, one dish with potato and vegetable, salad, bread and butter and sometimes coffee and sometimes dessert.
W: And you pay the price listed next to the main course?
M: Right. Like the roast beef dinner is $7. 85—plus tax and tip, of course.
W: It’ s all looks pretty expensive to me.
M: It’ s not. This is only a bit more expensive than McDonald’ s. So enjoy yourself. We’ re celebrating, remember?
W: You’ re kind.
M: Friends are friends. I cannot get promoted often. Are you ready to order?
W: Ah, can you tell me what Hot Fudge Sundae is?
M: That’ s a dessert. It’ s an English specialty. It’ s a kind of ice cream with a hot sticky sauce over the top—very sweet and fattening!
W: I don’t really like the sound of that. How come here is English food? I thought we agreed to eat American food.
M: Our country is made up of people from all over the world, so besides collected words and phrases from every language, we’ ve also absorbed recipes. We even have a lot of Chinese restaurants now.
W: Which is better, French or Chinese cuisine?
M: I’ d say it’ s a toss-up. I love them both.
W: I didn’ t know you were so fond of foreign foods. When my boss promotes me, I will take you to a French restaurant near my company. The food there is delicious.
M: Oh, we will have a second dinner soon.