U: I'm looking for a train to broxbourne.

S: Where would you like to leave from, and what day and time would you like to travel?

U: I'm going to be leaving from Cambridge. I need to leave on Tuesday by 13:00.

S: Is there a time you would like to get there by ?

U: I don't have an arrival preference.

S: The earliest train leaves at 5:01. The latest train leaving by 13:00 would depart at 12:01. There is also one that leaves at 13:01. The trains run every hour.

U: Actually, I'd like to arrive by 13:00. Could you give me the train ID for the train arriving closest to that time?

S: Train ID is TR6357. Would you like to book ?

U: No thanks. I'd just like to know the travel time please.

S: The total travel time is 60 minutes.  Is there anything else you need to know?

U: I need to find a expensive hotel in the north.

S: I don't have anything that matches your description. We do have some 4 star options in the moderate price range to offer or we could search in another part of town.

U: ok how about a guesthouse in the north that is expensive with free parking.

S: I am sorry but there is nothing matching that request.  Would you like to try another price range or area?

U: Sure let's try a moderate price range.

S: acorn guest house is a moderate piced 4 star guesthouse with free internet and parking. Would you like to reserve this one?

U: Do they have good options for breakfast?
S: Yes, the acorn guest house has good breakfast options that people seem to like. Do you want to know anything else?