U: I am looking for a German restaurant in the expensive price range.

S: There are no restaurant that fit your description, do you want me to look for restaurant with moderate price range?

U: Did you try the center of town?

S: Yes, there are not any restaurants available.  Would you like to try a different price range?

U: How about an expensive Indian restaurant?

S: Yes, there are several expensive Indian restaurants in the centre area. Curry Garden and Saffron Brasserie and a few others. Should I book a table for you?

U: Do either of these locations serve a high-quality, reasonably-priced Tandoori Chicken?
S: I don't see any information from the Saffron Brasserie, but most people found the tandoori chicken at Curry Garden to be reasonably priced