Are there any trains leaving cambridge?
There are many trains leaving Cambridge 
I'm trying to get to London Liverpool Street on Friday.
When would you like to leave? 
I don't have a preference but I do need to arrive by 14:45.
Friday at 5:59 would you like me to book it for you ?
Yes, please book it for 3 people.
Great.  Your booking was successful.  The reference number is E2998ZVM.
Thanks! Now can you help me find an expensive restaurant to go to in the centre?
There are lots of expensive food options in the centre. Do you have a preferred food type?
Can you just suggest one for me?
I recommend bedouin. Do you want a reservation?
Yes, please reserve it for 3 people on Friday at 11:45. And I want the reference number too
You are booked for 3 at 11:45 on Friday at Bedouin.  Your reference number is JETYPNVX. Have fun! Anything else?
Awesome, that is all thanks for your help.
Thank you and enjoy your stay!