Yes, I need a train to Kings Cross on Tuesday. 
Okay. Where are you departing from?
The main City Hall
I don't show that there are any trains departing from City Hall. Would you like another departure site?
Yes, please. I will departing from Cambridge. 
And what time would you like to leave or arrive by?
I need to leave by 17:00.
There is a train at 17:00 going to Kings Cross. Would you like to book a ticket on that one?
I apologize. I meant to say that I need to leave sometime after 11:30. 
Is there a time you need to arrive by?
No, there is not. Any will be fine. I'll need tickets for 4 people, please?
Booking was successful! You leave at 15:00 and arrive at 15:51. Reference number 68ATC774.
Okay, great. I'm also looking for a place to stay. The hotel should be in the east. 
There are 7 available options in the east.  What price range would you like?
How about something moderately priced?
The Carolina Bed and Breakfast has both wifi and parking. Would you like me to book that for you?
Yes for 5 nights from Thursday for 4 people.
Can you book it for me and get a reference number ?