U: I want to dine at an expensive asian oriental food restaurant.

S: There are two restaurants that meet that criteria. May I suggest Kymmoy?

U: Which of the two restaurants is in the north?

S: Saigon City is in the North. Do you need a booking for that?

U: Are they serving top notch Sweet and Sour Pork at Saigon City?
S: Let me check recent reviews for you. I don't have any information about the sweet and sour pork specifically, but diners have said the food was good in general.