I need a place to stay and I would like a guesthouse. 
Do you have a location preference? 
No but I want it to be cheap and have a 4 star rating.
There are 7 guesthouses that match you criteria, do you have a location preference?
Any area of Cambridge is fine. Can you suggest a guesthouse that meets my criteria?
Autumn House on Newmarket Road is in the east near other shops and boutiques. It meets your needs perfectly. Would you like me to book you a room?
Yes please book a room for 1 people and 2 nights starting from wednesday.
Okay, that's taken care of.  Your reference number for your reservation is 8GBONI2D.  Is there anything else I can help you with?  
I'm also looking for a restaurant in the centre.
There are several restaurants. What type of food would you like?
I want somewhere cheap in the centre please
There are 15 cheap restaurants in the centre. What food type interests you?
I am willing to try any one of them. Could you make a recommendation, please?
Sure, I suggest dojo noodle bar. Want a reservation?
No need for a reservation. Can you just give me the postcode?
The postcode is cb21rq.  What else can I help you with? 
That is everything. Thanks!
Thank you and enjoy your stay in Cambridge