I would like to book a train that is running on Tuesday and departs anytime after 20:15, can you help me with that?
Where would you like to travel from and to?
The train should depart from cambridge and travel to peterborough.
Sure, I have 7 trains that would work. The closest to your requested time is the TR5110 that leaves at 20:34.
That will work. What is the price and arrival time for that?
That will cost you 16.50 pounds and you will arrive by 21:24.
That is great. I also want to know about a hotel called home from home. Can you find it for me.
Certainly. Home from Home is a guesthouse on the north end of the city. It offers free internet and parking and is moderately priced. Would you like to book a room?
Yes. I would like to book for 8 people for 3 nights starting from Saturday. 
Your booking was successfull! Reference number is I5VKNKJ3
Thank you have a nice day.
You too. Goodbye.