Can you book a hotel for me? I would like a 3 star hotel or greater in downtown Cambridge for tonight for 2 people.
There is one called the Gonville Hotel, but it's expensive. Is this alright?
yes that would be fine. Are there any colleges in the centre that we can also visit? And may I have the address please?
There are four in the area that are free and one that has a fee of 2 pounds, would you like more information?
Sure, which one would you recommend of the free ones? 
I would recommend Saint Catherine's College located at King's Parade, postcode cb23rl.
Thank you, I actually need a guesthouse with free parking.
Thank you for clarifying that you need a guest house. So that I might best find the right place for you, could you restate any other needs with regards to lodgings?
I need free parking in the moderate pricerange.
Unfortunately, I do not have any 3-star rated guesthouses that are moderately priced and in the centre with free parking. Would you like to change any criteria?
No that is ok! I decided that free parking is not a deal breaker for me. So can I book that guest house?
I don't see any 3 star guesthouses available in the centre. However Alexander Bed and Breakfast is a nice 4 star, cheap guesthouse. Does that work?
Does that guesthouse come with free wifi? 
Yes, they do offer free internet as well as free parking. Would you like me to book a room for you there?
yup.  5 nights just 1 person please, let's shoot for Monday.  Thanks.  
I'm sorry, your booking was unsuccessful, probably because the guesthouse is booked for some or all of these days. Would you like to try a shorter stay, or book another day?
Okay. Let's try for four nights and may I get the reference number.
I was able to find availability for 4 days.  Booking was successful.
Reference number is : 84JDP6OG.
Great!  That should be all I need.  Thanks for your help.  Goodbye. 
You're welcome!  Have a great day!