I am looking for a train from cambridge to ely.
There are 70 trains from Cambridge to Ely. Do you have a preferred departure time and date?
I want to leave on Thursday. And be there by 11:15.
I have three trains that match your specifications. Do you have a time you would like to leave by?
No, any of them is fine. Please give me the departure time that you choose.
The departure time for trainID TR0996 is 05:50
Thank you that's all I need today. 
Excellent! Have a good day.