I need to find a train going to londons kings cross that would arrive by 17:15
I have 21 trains that match your request. Where will you be departing from?
Leaving Cambridge this coming Sunday.
I'm sorry, we don't have any trains arriving by 17:15. The earliest train will arrive at london kings cross at 19:51. Do you need anything else?
No thanks.  Go ahead and book the train for 4 people and please provide the reference number.
Your booking was successful, the total fee is 75.52 GBP payable at the station .
Your reference number is : UMS71SR7.  Your train will leave at 19:00. 
Thank you. I also need to find a place to stay.
Any particular area you would like to stay?
In the East part of town, please. I need free WiFi.
Okay! Would you like to stay in a hotel, or in a guesthouse?
i dont mind either. 
We have seven places, any preference on price or rating?
I need a 4 star place that has free wifi. 
Okay! What price range would you like?
I don't really have a preference.
Ok. We've narrowed to 6 options. Do you want parking?
No parking is not a concern of mine.
Would you like to try allenbell?
Yes, please book me for 4 people, for 5 night starting on Tuesday.
I have made those reservations and the reference number is  I4K0OYPF.
Thank you that is all I needed. 
You're welcome. Have a great day!