I am looking for a guesthouse to stay at that has free wifi.
Ok.  Were you hoping for a particular price range or part of town?
I don't care about the part of town or the price range, but it needs to be a three star hotel. 
The Hamilton Lodge would be perfect! It is a moderately priced 3 star guesthouse on the north side of town. Does that sound okay to you?
Does the The Hamilton Lodge have both free wifi and free parking?
Yes, it does. Do you want to make a reservation?
Yes please book the Hamilton Lodge. 
What night would you like me to book for you, and for how many people?
Wednesday, 6 people, for five nights, please. 
I am sorry, the Hamilton is already booked. Would you be interested in the Bridge Guest House instead? It is the same as the Hamilton but is in the Southern area.
Yes, that will be fine.
Okay. I was ablt to book you into there and your reference number is O4BPEOXQ.
Great. Thanks so much for your help.
Is there anything else I can help you with today?
No that will be it. Thank you.
You are welcome. Enjoy your stay in Cambridge!