I am leaving Tuesday and need to take a train from Cambridge to Ely
Certainly. It looks like the trip is 17 minutes long. When would you like to leave?
I need the train to arrive by 11:15.
The TR3246 arrives at 10:07, would you like to book that train?
When does that train depart?
The train departs at 09:50.
Great.  I'm not ready to book today though.  I am also looking for a place to stay.
where are you staying and for how long and how many rooms please
I don't know where I am staying. I'm looking for a guesthouse and I thought you could help.
There is a variety of guesthouses to choose from.  How much would you like to spend?  We have cheap, moderate, and expensive.
I would like the expensive price range.
I don't have anything in the expensive range that fits that criteria. 
If you can't find a guesthouse, could you look for a hotel?
There are 5 available hotels. What area were you looking to stay? 
i would prefer the south. are there any in that area? 
There is one expensive hotel in the south -- The Lensfield Hotel. It is a 3-star hotel. Would you like to book a room? 
please book it for 3 people and 5 nights starting from Thursday.
Make sure you get the reference number
The Lensfield Hotel will be expecting the 3 of you to arrive on Thursday and to stay for 5 nights. Your Reference number is : VOGVC4RY.
Great, that's all I need, thanks so much for your help! Have a great day!
Thank you for using the Cambridge TownInfo centre. Goodbye.