U: I am looking for a nice restaurant in the center of town.

S: Do you have a price ranger preference?

U: he restaurant should be in the expensive price range.

S: There are 33 expensive restaurants in the centre of the city. What type of cuisine are you seeking?

U: I'd like Japanese food, please.

S: Yes I found a perfect fit for you. Wagamama is a Japanese restaurant that serves expensive food in the center of town. Would you like their address and telephone number?

U: Do you know if they serve large portions ?
S: I'm sorry, the reviews are split with half of the customers saying that the portions are big and the other half saying they're small. I can't really tell.