U: I need to take a train departing from stansted airport?

S: I can help you with that. Where would you be going and what day?

U: I'd like to leave cambridge after 14:00 on Sunday.

S: Can you verify whether you are leaving from stansted airport or cambridge?

U: I need to leave from stansted airport to cambridge.

S: The TR4227 train leaves at 14:24 would you like that one?

U: Yes, may I get travel time in minutes? I am also looking for a restaurant that is expensive and serve afghan food.

S: The duration of that train is 28 minutes. There aren't any restaurants meeting those specifications.

U: There isn't any afghan places in the centre?

S: I'm afraid we don't have any restaurants in Cambridge that serve Afghan food. There are several expensive restaurants in the centre that serve other cuisines. Should we try one of those?

U: Are there any that serve Indian food, instead?

S: There are 6 restaurants in the centre that are expensive and serve indian food.  Curry Garden, The Golden Curry, Saffron Brasserie, Panahar, Curry King, and Curry Queen.

U: Do any of them have cool outdoor seating?
S: Curry Garden, The Golden Curry, Saffron Brasserie, Curry King, Panahar all have outdoor seating. I don't have information about the Curry Queen.