I need a train that will be leaving from cambridge by 16:30, can you help me with this please?
Where would you like to go and on what day?
I need the train to leave on Monday before 16:30 for Ely.
There are 10 trains leaving before 16:30. What is the earliest you'd like to leave?
The latest I can leave to arrive by 16:30 please. 
The last train that will arrive by 16:30 is train TR7177. It departs at 15:50 and arrives at 16:07. Would you like me to book a ticket for you?
Yes, but how much is the ticket going to be and how long is the travel time?
The travel time is 17 minutes and the price of the ticket would be 4.40 pounds. Would you like me to book that for you?
Yes, and once I am in Ely I need a place to stay on the north side of town with at least a 1 star rating, and has wifi.
There are 11 possible selections in those parameters, do you have a preferred price range? Would you like a guesthouse or hotel?
Any price range and area is fine. But, is it possible to look for a 3 star hotel or guesthouse instead. 
Hamilton lodge is a guesthouse in the north with a 3 star rating and moderately priced. Would you like me to book a room for you?
If they have free parking, yes.
Ok. I'll need the day, length of stay, and number of people. 
First, do they have free parking?
I apologize. Yes, Hamilton Lodge provides guests with both free wifi and free parking. I can set you up with a room if you like. 
Not at this time. thank you so much for the information. That's all I need today.
Have a nice day!