I need to find a British restaurant in West Cambridge.
There are multiple options for you. To narrow them down what price range do you have in mind?
No, can you recommend a favorite?
I would recommend Graffiti.  It is a bit expensive, so if you want something moderately price there is also Saint Johns Chop House. 
Please book 2 tables for 8 people on friday also i need train tickets for 8 people.
What time would you like these reservations?
Graffiti sounds good.  I actually need that reservation for 5 people at 20:00 on Wednesday. Can I have the reference number for that?
Booking was successful. The table will be reserved for 15 minutes.
Reference number is : YYPPDY56. anything else i could help you with?
I would also like a train departing from london liverpool street and arriving in Cambridge at 09:00 on the same day.
There are two trains that would work. One arrives at 07:07 and the other arrives at 01:07. Which one would you prefer?
Can you book the train that arrives at 07:07 that one would work great. I need the reference number as well. 
i can definitely do that, how many tickets would you like?
it's for the same group of people
Alright, I've booked a train for your group, the reference number is AOIMGBHK, and there will be an 83 GBP fee at the station.
Great, thanks!  That's all I needed right now!
You're welcome. Have a great day.