I need help finding a train that will depart on Saturday. 
Okay we have a lot of trains departing on Saturday. Where are you headed and where are you departing from?
I am going to Cambridge and leaving from Stevenage.
What time do you need to arrive?
by 18:45 please. 
I have seven trains available.  What time do you want to leave? 
The train should arrive by 18:45 and should leave on saturday.
I have train TR9925 leaving at 7:21 ad arriving at 8:10 and the cost is 10:24 pounds. Would you like reservations?
Yes please.  Also I am looking for a concerthall in the east.  If there are none available, how about a boat attraction.
I found one boat attraction.  Camboats located at the plough, green end, fen ditton.
I think that is all I need. Thank you. 
Have a great time.