U: Can you help me find a moderately priced restaurant that serves North American food? Thanks.

S: Unfortunately, I am unable to locate a moderately priced North American restaurant. I did find an expensive one, would you be interested in that?

U: No. How about Italian food?

S: Sure.  There are five moderately priced italian restaurants.  Would you prefer a certain part of town?

U: Perhaps the center? But I don;t think I have a preference.

S: Pizza Express is a great place that serves moderately priced Italian in the city centre. Would you like me to make you a reservation?

U: Do they have large portion sizes?
S: The reviews are mixed on the portion sizes with some customers saying they were very good while others found them to be lacking. Would you like to know more about them or should I look for other places?