U: I need a italian restaurant in the centre.

S: what about pizza express? it's getting great reviews.

U: Is it an expensive restaurant?

S: No, Pizza Express is moderately priced. But I could find a cheaper option if you would like?

U: I would prefer an expensive price range and need a reservation for 1 at 13:30 on Monday.

S: I am sorry but there are no Italian restaurants in the expensive range in the centre.  Would you like to try another area or type of food?

U: What would you suggest?

S: There are two moderately priced italian restaurants in centre or would you like a different type of food?

U: so, nothing that is expensive?

S: no expensive with those specifications

U: Okay, let's just go with a moderately priced one. I need a table on Monday at 13:30 for one person.

S: Would you like to try pizza express?

U: Do they offer large portions of food?
S: The portion sizes vary based on the specific order at Pizza Express. Would you still like me to reserve a table for you?