U: I am  looking for information in Cambridge.  looking for a restaurant.

S: Sure, what kind of restaurant?

U: It doesn't matter but it should be expensive and it should be in the centre.

S: Do you have any cuisine preferences?

U: Yes, we would like American type food.

S: We actually have different categories of american food -- latin american, modern american, north american, and "the americas." Which of these would you prefer?

U: How about latin america?

S: I'm sorry. I have no results that meet your criteria. Would you like to try a different food type, price range, or area?

U: How about North American cuisine instead?

S: Gourmet Burger Kitchen is expensive and in the center.  Would you like to book a table?

U: Does Gourmet Burger Kitchen have a nice relaxing vibe and atmosphere?
S: Gourmet Burger Kitchen isn't known for having a very impressive atmosphere. If that's important to you, I can suggest another place that might better meet your needs.