I am planning a trip in Cambridge
Alright, how can I help you today?
I am looking for a restaurant that serves Afghan food in the centre.
There are no Afghan restaurants in the centre of town.
What about an international restaurant?
May I recommend the Bloomsbury restaurant in the moderate price range.
What's the postcode for that place?
cb23dt. What else may I help with?
I am looking for a train that will depart from Cambridge and will arrive to London Liverpool Street.
sure, what day are you traveling?
I will be leaving on Friday after 08:30. 
train ID TR4187 leaves 13:59 and will cost 16:60 pounds. can i book for you?
No, thanks! But how long is the ride?
The train ride is 88 minutes long.
Thank you, that will be all.
You're welcome, have a good day.