Hello, I'd like to book a train on Friday that arrives by 17:30.
What's your to and from location? 
I am leaving from London Kings Cross station and traveling to Cambridge.  
There are 6 that arrive by 17:30, the closest being TR8842, which arrives at 16:08. Is that to your liking?
yes, please! what's the reference number?
Can you please tell me how many tickets you will need for this trip?
I will need 2 tickets
OK, I've booked you for 2 tickets with reference number ERCAZMGA. The fee will be 47.20 GBP, payable at the station. Can I help you with anything else?
Yes, I'm wondering if there are any expensive modern european restaurants in town.
Yes, darrys cookhouse and wine shop.
I would like to book a table for 2 people at 20:00 on friday please. 
I have successfully booked that for you. Your reference number is ZCMA7GFP.
Thank you, that will be all.
Okay, great. Have a good day!