Hello. I'd like a train to ely please.
I can do that. When and where will you be catching the train? 
I will be departing from Cambridge on Wednesday. I would like to leave after 21:00.
Thanks for that information. Is there a time you would like to arrive by?
No I don't have a specific time to arrive. 
TR8533 will leave Cambridge at 21:50. Would you like a ticket on that train?
No thank you but I do need the arrival time and train ID.
The train ID is TR8533. Is there anything else I can help you with?
Can you also help me find a 2 star hotel to stay at?
Yes I have 3 choices in the north and east from moderately to expensively priced.