On Saturday I need a train that will arrive by 21:45.
Can you tell me where you will be departing from and heading to?
I will be leaving from Ely and going to london.
Would that be London Liverpool or London Kings Cross?
Either one is fine with me.
Are you sure you don't have a preference?  
Yes I'm sure. I need to book that for 5 people.
We don't have any trains going from Ely to London Liverpool or London Kings Cross. Do you need anything else?
I want a train departing from Cambridge, going to Ely. Saturday, arrival by 21:45.
The TR7349 train arrives at ely at 20:07. Would you like to book it or more information?
That's a good time. Please book TR7349 for 5 people, please.
All set! 
Booking was successful, the total fee is 17.6 GBP payable at the station .
Reference number is : H8XDA6RZ.
I am also looking for a place to stay that is cheap and 4 stars.
That leaves about 8 places to choose from. Are you looking to stay in a certain area of town? 
Yes, i need a guesthouse in the east please.
Okay! How about the Allenbell? It's cheap, 4-star, and has internet and parking!
Great! May I please have the phone number and postcode?
Postcode is cb13js, phone number is 01223210353, anything else that I can help with?
I got it.Thank you.
You're welcome. Have a great day!