U: I am looking for a Saturday train departure from Cambridge

S: What destination would you like me to look for?

U: I'm hoping for a train to bishops stortford after 21:15.

S: There are 2 trains that fit this request. One at 21:29 and another at 23:29. Did you want me to book one of them for you?

U: Yes please book the train for 23:29.

S: How many tickets do you need?

U: I don't need a booking, but can you tell me the train ID, travel time, and arrival time of that train?

S: TR0123 is the train ID. It leaves at 23:29 and arrives at 24:07. Did you need any more information about the train?

U: No, but I need to find a restaurant. It should serve vietnamese food and it should be in the north.

S: Unfortunately, I'm not seeing any Vietnamese restaurants in the north. Would you like to try a different area or type of cuisine?

U: How about a Chinese restaurant. Ideally expensive.

S: Hakka and The Hotpot are both expensive Chinese restaurants on the north side of town. Would you like a table at one of these?

U: Is the food worth the price?
S: People have very mixed views on the value of the food at both The Hotpot and Hakka. Some feel it's a good value, but others do not.