I am looking for a moderate priced place to stay.
Yes, let me help you with that. In what area of town would you like to stay?
I would like a place in the centre with free parking.
I do not have anything like that, perhaps another criteria for you?
Sure, let's try the north instead please
There are several options in the north, would you like me to recommend one?
Yes and book it for 3 people and 3 nights starting from wednesday.
Okay I have booked The Acorn Guest House for Wednesday for 3 people and for 3 days. Your reference number is F821XS1G. Is there anything else I can help with?
You've been great, that is all I needed. Thank you, goodbye! 
I hope you enjoy your stay in Cambridge!