U: I would like to find a restaurant in the expensive price range that is located in the city center.

S: There are 33 expensive resturants in the city center.  We could narrow it down more by food type. What type of food would you like?

U: I do not care about that.

S: Bedouin serves African food, is in the center, and in the expensive price range. Do you want me to book this restaurant?

U: Yes, I'd like to book a table for seven at 19:15 on Tuesday.

S: Ok I have booked you at Bedouin on Tuesday at 19:15 for 7 people.

U: May I have the reference number please?

S: It is actually not open then, another day or place to dine?

U: How about a different restaurant in the area and price range?

S: I was able to book you at the Cambridge chop house. Reference number K1T50MHG.

U: Do they have a great selection of non-alcoholic drinks?
S: No, one shouldn't choose to dine at the Cambridge Chop House for their selection of non-alcoholic beverages, which are limited.