U: I want to find a brazilian restaurant that is cheap.

S: I'm very sorry, there are no results for cheap Brazilian restaurants. Would you like to try for a different type of cuisine?

U: Do you have any restaurants in the centre?

S: I have 5 different cheap restaurants in the centre. Three are chinese restaurants, and the other two serve asian oriental. Do you have a preference?

U: How about a Italian restaurant located in the centre

S: There are three in that area. Pizza Hut City Centre, Ask, and Zizzi Cambridge. Is there any more information you'd like about any of them?

U: How generous are their portions?
S: Both Pizza Hut and Ask have really good reviews on their portion sizes with customers thrilled at the generous amounts. Would you like to know more about them?