I'm looking for a train that is going to birmingham new street and leaves after 17:15. 
There's a train on that route every day departing at 18:01 that ought to work for you. Do you know what day you'll be travelling?
I will be traveling on Friday. 
Where will your departure site be?
I will be leaving from Cambridge.  I will need 4 seats.
Great I booked you 4 seats on that train and your reference number is HI8OJSIM.
I also need to get a place to stay that is in the moderate price range and have 3 stars. 
Sure, there are a few guesthouses available.  Which part of town would you like to stay in?
West part of town. Thanks 
It looks like there is a 3 star guesthouse in the area named Hobsons House.  How does that sound?