U: I would like a cheap Mexican restaurant, please.

S: What part of town would you like to dine in?

U: I don't care

S: I'm sorry, but our only Mexican restaurant is expensive.  Would you like more information or could I search for another type of restaurant for you?

U: Is there any Cheap vietnamese locations?

S: Thanh binh is a cheap vietnamese restaurant.

U: Does it have a nice place for dining outside?
S: No, according to reviews there is no outdoor seating area at this place. Do you want to explore some other options?