I would like to book a train for Monday departing from kings lynn and arriving at Cambridge at 14:45.
What time would you like to leave by?
Can you please provide me with the departure time of the train arriving by 14:45 or just before? 
The departure time is 13:11. 
What time is it scheduled to arrive?
The departure time is 13:11.  May I book some tickets or provide you with further assistance today?
Thanks so much for your help. That's all today.
Okay, thank you so much for contacting us. Have a great trip!