U: I am looking for a restaurant in the cheap price range that serves British food.

S: I am sorry there are no restaurants that meet those requirements. Would you like to try another type of food?

U: What British restaurants are available in the centre to choose from? I'd like to book a table at 17:15 for one on Saturday.

S: I can book a table for you at the oak bistro. They are moderately priced and you won't be disappointed

U: Do they give large food portions?
S: The Oak Bistro has large portions, that I can tell you. Do you want to make a reservation there, or would you like to see some other options?