I am going to cambridge and need a place to stay
Do you have a specific area or price range you'd like?
a guesthouse would be nice, it should have free wifi and parking and expensive price range 
I apologize but there are not any guesthouses that meet those criteria.  Would you like to try a hotel or perhaps a different price range?
Could you try one that is cheap?
I've got about 9 options that are cheap. To narrow it down, do you have a preference on the area of town you want to stay in? 
Are any of those options that are cheap guesthouses?
Yes, they're all inexpensive guesthouses, though some are quite nicely rated, like Rosa's Bed and Breakfast with 4 stars.
That sounds nice, what area is that located in and what is their address?
Rosa's is located in the south area of town at 53 roseford road. Can I provide you with anything else?
I need a train to cambride.
There are several choices depending on what works for you. What day would you like to leave and where are you departing from?
Yes, the train should leave after 08:15 and depart from london kings cross on thursday.
Sorry, there are not trains  this hour. What other hour do you prefer to search?
There are no trains that leave after 08:15 in the morning from London Kings Cross to Cambridge on Thursday? It doesn't have to be 08:15 exactly.  
I have TR8410 departing at 09:17 on Thursday.  Would you like me to book that for you?
What time does it arrive and how much will it cost?
TR8410 will arrive at 10:08 and the fare is 23.60 GBP per person.
Okay, thank you for that information. That is all I need for now.
You are very welcome! Call anytime for assistance and we will be happy to help you further.  Have a fantastic day!