U: I need a train from Cambridge leaving after 18:30 in the evening please.

S: And what is your destination please?

U: London liverpool street. I need the train for wednesday.

S: I have three trains matching your preferences.  Would you like me to book TR6037 that leaves at 19:59?

U: Yes, that should be fine, can you tell me how long is the travel time?

S: The duration is 88 minutes.  How many tickets would you like to book?

U: I don't know at this time. I would have to check.

S: Okay! The price for each ticket would be 16.60 pounds.

U: Are there any restaurants that would be in the west?

S: Yes, there are many results for restaurants in the west. Are you looking for a particular type of food or price range?

U: I don't care what kind of food, but I am looking for an expensive restaurant.  Please let me know what food type you find.

S: I have 9 entries.  You want me to make you a reservation at Graffiti?  They serve British food.

U: Are they near any other attractions? Is it in the center of town?
S: ailYes, it's right downtown, which is very convenient. Shall I check on avaibility of tables for your visit?