I want a train that goes to stansted airport and leaves from cambridge. 
There are many that leave cambridge and go to stansted airport; what day would you like to leave and what time?
I need the train to leave after 09:15 on Saturday.
I have train TR2755 that will leave at 09:40 and put you at the airport by 10:08. Would that work for you? If not, I have later trains. 
That train works well.
Would you like me to book this train for you?
Yes please. Get me 8 tickets for my party as well as a reference number.
Your reference number is UKOTND0A. Would you like anything else today?
I also need a hotel that has free parking. I don't need internet or anything like that.
I have 29 places to stay with free parking. Is there a price range you'd like to stay in?
Are any of the 29 places, guest houses?  I would actually prefer a hotel rather  than a guest house.
There are 8 hotels that match that description. Did you have a price range or area in mind?