I need informant on trains.
okay what information do you need per say?
I'd like a train from Cambridge to London Liverpool Street, arriving by 21:30 on Tuesday.
TR3515 will arrive at 21:27, would that work for you?
Sure. Could you tell me the typical travel time, and price for a ticket?
The typical travel time is 88 minutes and it is 16.60 pounds per ticket. Would you like for me to book that for you?
No. Could you please find me a restaurant in the center of town  in the expensive price range?
We have 5 different restaurants in the centre. Two of them are expensive, one of them is African cuisine, the other is oriental cuisine. What do you prefer?
What are the expensive ones?
We have the Bedouin, Kymmoy, Fitzbillies Restaurant, The Cambridge Chop House, and The Midsummer House Restaurant.  All 5 are expensive and in the town centre. 
Could I have the postcode of one that you recommend?
How about Bedouin? The postcode is CB12BD. Can I help you with anything else?
no that is it for today. thanks for helping
You're welcome, have a great day.