U: I need a train that leaves Cambridge at 21:30

S: And what is your destination for that trip?

U: I want to go to London Liverpool Street

S: I found 14 trains.  What day do you want to travel?

U: Thrusday. Can I also ask the price of these trains?

S: The price is 16.60 pounds. I have 2 matching trains. One arrives by 23:27 and the other arrives by 01:27. Do you want to book either?

U: No thank you. I am interested in finding an expensive place to eat in the centre of town. Any recommendations?

S: I have many restaurants like that. What kind of cuisine are you looking for?

U: I am looking to book a table for 2 at 12:45 on Thursday at a thai restaurant.

S: The only expensive Thai restaurant in the center, Bangkok City, doesn't have any availability at that time. Would you like to try something else?

U: Can you tell me if they offer a good selection of beer?
S: Yes, I can find that information for you. Bangkok City serves alcohol, although I don't have any reviews in the database that mention beer specifically. There are however many drink options to select.