I need a train from cambridge to go to london liverpool street
sure, what day are you traveling?
I will be traveling on Thursday.
Do you know what time you need to depart or arrive by so I can narrow the options?
I will be traveling on a Sunday, and I need to arrive by 14:30
You will be traveling on Thursday or Sunday? You've said both. 
I should leave Cambridge on sunday and arrive in london liverpool street by 14:30. I need 4 tickets and a reference number.
TR5504 would arrive at 13:27, would that work?
Yes, that's perfect. I need tickets for 4 people, please.
Booking was successful, the total fee is 66.4 GBP payable at the station . Reference number is : B8QZ32WO. Can I help with anything else?
Yes, i need to find a restaurant to visit in the centre of town. Preferably in the moderate price range. 
There are 21 that fits your criteria. Which cuisine would you like, to help narrow your choices down?
It doesn't matter.
Yippee Noodle Bar meets your criteria, would you like their information?
Yeah, tell me the address for that restaurant and the type of food they serve
They are an Asian/Oriental restaurant, and are located at 40428 King Street City Centre. Is there anything else I can assist you with?
That is all that I need.
Thank you for using the Help Desk.  Have a great day!