U: What does Cambridge offer so far as expensive, German restaurants?

S: There's no restaurants meeting your criteria. Would you like to change anything parameters?

U: Oh really? I was hoping to eat expensive German cuisine in the northern part of town.

S: Would you like to search for something else?

U: Is there any asian oriental restaurants in the north area?

S: Yes, there is one called Saigon City. Would you like more information?

U: Do they have large portions?
S: About half of the customers liked the portion size while half of them said that the portion size is were small..