I would like a four star hotel. 
I can help you with that.  Is there a particular part of town you would like to stay in?
No but I need it to have free parking and cheap.
There are several like that. Would you like to book a room at Rosa's Bed and Breakfast, or perhaps one of the others?
I'm looking for a hotel type place to stay. Are any of those hotels?
The Cambridge belfry is a four star hotel in the cheap price range.  Would you like me to book it for you?
Cambridge Belfry sounds great, can I get the reference number once you make that reservation?
What day do you want to start your stay, for how many days, and how many people?
4 people, 5 nights on saturday. If that's not available try a different one same price range.
I am sorry. I could not make that booking. Would you like to try another hotel?
Yes one that is in the same price range.
Autumn house is a cheap guest house in the east. Would you like me to book that for you?
Yes. That sounds great. Please try to book it.
That one was successful! Your reference number is REZ4BR01.
Thank you. That's all I needed today.
Enjoy your stay in Cambridge. Goodbye!