Task-oriented dialogue about: train

I am looking for a train departing from london liverpool please.
I'll be glad to help. You would like to from london liverpool street to what destination, please?
Cambridge. I'd like to leave after 10:00 on Friday.
I have seven trains, could you tell me when you would like to arrive by ?
Just any time after 10:00, can I get the train ID of one of them please?
TR7943 leaves at 11:39
Thank you very much! That is all I need for today.
Have a great day!