I need a train that leaves on Friday after 20:45.
There are oodles of available trains so let's narrow that down a smidge. What are you departure and destination locations?
The train should depart from cambridge and should go to london liverpool street
I would suggest TR9557 which leaves Cambridge at 21:59 and arrives at your destination at 23:27.  
Sounds great! Thank you very much! What is the price on that train?
The train is 16.60 pounds. Can I book that for you?
Sure. I also need a reservation at rosa's bed and breakfast.
I have you booked for 1 seat on the TR9557. What day are you wanting to book Rosa's bed and breakfast for?
What is their address and do they have free parking or free internet? 
Rosa's has both free parking and free internet. 
Could I get the address please?
Their address is 53 roseford road, cb22ha. Can I help you with anything else?
I think that's all I need.  Thank you very much.
Thank you for contacting us, if you have any further questions, feel free to contact us again. Have a wonderful day.