Is there a train I can take to cambridge that leaves after 18:00?
Absolutely. Where are you coming from?
I'm departing from birmingham new street.
I have train TR8903 that leaves at 18:40 and will arrive in Cambridge at 21:23. Would that interest you? 
Yes please book me for one ticket.
Booking was successful, the total fee is 75.09 GBP payable at the station .
Reference number is : KHBLJGHN.  Is there anything else I can do to assit you today? 
Also looking for a guesthouse in the cheap price range.
Are you going to stay in a specific area of town?
The area of town is not important, but I would like a hotel with free parking and four stars.
I have the allenbell would you like information on that?
Yes please. Can you tell me anything about it- How big are the rooms? Do they offer suites?
I don't have that information in front of me I can give their phone number
Yes, I need the phone number please!
01223210353 is the phone number
Could you go ahead and book me the guesthouse? 
What day would you like the reservation to be on?
I am not looking to book just yet, actually.  Just please find information on guesthouse in the cheap price range.
I have several to choose from is there an area you'd prefer?
It needs 4 stars please.
Ok! I highly suggest the Leverton House. What information are you looking for?
I just need their phone number please.
Sure, the phone number is 01223292094.  Can I be of further assistance?
No thank you that is all I needed. 
You are welcome, have a good day.