Could you help me choose a train running from Stansted Airport to Cambridge?
Certainly. Which day would you like to travel?
I need to leave on Sunday after 21:15 please.
There is a train leaving at 22:24 from Stansted Airport on Sunday. Would you like me to book it?
yes, that would be great.
How many tickets do you need?
actually just tell me how long the trip is
The duration is 28 minutes. May I help with something else?
I also need a place to stay in the moderate price range. 
Do you want a hotel or a guesthouse ?
I would like a 3 star hotel in the moderate price range, please.
Sorry, I don't have any 3 star hotels in the moderate price range. Would you like to try a guesthouse or a 2 star hotel perhaps?
I don't care what area. Can you double check please? I also need wifi.
There are no results. Perhaps we could try a different type or star rating?
Sure, let me know what is available.
I have 2 star rating hotels. Would that work for you?
Yes, whateveryou recommend, can we book it for two people and four nights starting friday?
Booking was successful for the ashley hotel. Reference number is : OF50YGXK.
Thanks for your help. Have a great day. 
You are welcome, goodbye til next time.