I'm need a cheap place to stay that has free parking.
There are several in that priced range. Is there a certain area you would like to stay in?
I'd really like to stay in a guesthouse. What do you have available?
how about alexander bed and breakfast? they are lovely
Sure. Can you book it for 5 people for 2 nights starting Saturday? I also need the reference number. 
I've made those reservations and your reference number is GDS15VTZ.
Thank you. I am also looking for a train that departs from cambridge after 19:30. 
Where will you be heading and on what day please?
Going to broxbourne on Monday. 
TR2292 leaves cambridge at 20:01 and arrives at 21:01, will that train work for you? 
Yes, it will. Can you book 5 tickets for me please? 
Okay, 5 tickets have been booked! Your reference number is 4VIS4L43. Can I be of any further help? 
No thank you that is all I need today. 
It was a pleasure to help. Have a good day. Goodbye.