Hi, I would like to purchase a train ticket.
I can help you with that. Where would you like to arrive and depart from and on what day?
I want to depart from london liverpool street on Saturday leaving after 08:30 to go to cambridge
TR0357 will leave at 09:39, would that work for you?
That sounds like it will work. Can you book 7 seats for us? I'll need a reference number.
7 seats have been booked and your reference number is: MN2WKAWI
I also need to find a place to stay while there. Preferably something expensive.
ok there are 5 different ones. Which area of town are you wanting to stay in?
I'm flexible on the area but I really want a hotel instead of a guesthouse. And I would like something with 4 stars. 
You have two choices that match your criteria: Huntingdon Marriott Hotel in the west, and University Arms Hotel in centre. Would you like to book a room at one of these?
Do either of them have free parking? 
Yes, both of them. Is there anything else about them you'd like to know?
I would like to book one of those for 2 nights please. 
OK, how many people will be staying and what day will you be checking in?
7 people on the same night.
Booking was unsuccessful at both hotels. Would you like to change the duration of your stay?
Sure, try just 1 night.
Booking was successful at the University Arms Hotel located in the centre of town. They are 4-star rated and have free parking and wifi. Reference number is: 5Y7U9B9A. Is that ok?
Yeah that works for me. It's also all I needed for today. Thanks!
Thank you for using our service. Have a great evening. Goodbye.