I'm looking for a hotel (not a guesthouse) on the west side of town. Can you tell me about my options?
The Huntingdon Marriott is expensive, and I also have the Cambridge Belfry, which is cheap. Are you interested in one of these?
What do you have with a rating of 1 star?
There are no 1 star hotels in that part of town.  Is there another area you might be interested in?
No, it has to be in the west. A 4 star place would be okay, as long as it is a hotel and not a guesthouse. 
No hotels meet your criteria. Would you like to change your criteria?
Well, I definitely want a hotel in the West. I need one for 6 people for a stay of 5 nights starting Saturday.
Sorry, there are no hotels meeting your criteria. Could you change your criteria?
Is the Cambridge Belfry available for 4 nights starting Saturday for 6 people?
Unfortunately, no. Can we try a shorter stay period?
Are there any four star hotels in the west?
Yes, huntingdon marriott hotel and the cambridge belfry.
TO recap, I need a hotel in the West, four stars.
huntingdon marriott hotel and the cambridge belfry are 4 star hotels in the west.  The second hotel is cheap & the first is expensive, which would you prefer?
I'd rather have the least expensive one. What star rating is it?
It is a 4-star rating.
OK, can you just book a 4 star hotel room in the west part of town?  Any one is fine.
Both of these hotels are booked. Would you like to change any of your parameters?
Let me try again.  I am needing a 4 star hotel in the west, for 6 people.  Checking in on Saturday, 5 nights.
That worked, thank you for summarizing for me.  Your reference number is U0E4KO2T.  Is there anything else I can help with?
I need a Hotel type in the west that's 4 stars to book for 6 people for 5 nights, starting on Saturday, please recheck that you can't book that.
I have that all worked out for you, the reference code is MQ7AMF1M. The hotel is the Cabdrife Butterfly.Is there anything else you need?
No, I'm sorry that was so confusing.  It appears I have 2 hotels, but that is better than 0.  Have a good day.  Bye.
You have a good day also.  Bye.