I would be in cambridge and I need to find a train that will be leaving from peterborough this sunday, can you help me find one?
Am I correct that you are travelling from Peterborough to Cambridge on Sunday? There are plenty of options for that trip. Do you have any preferences on departure and arrival times?
Yes it has to leave on Sunday after 19:15.
On Sunday, train TR3922 leaves Peterborough at 19:19 and arrives in Cambridge at 20:09 and is 13.20 pounds. Would you like me to book this for you?
Yes, can you please book 4 tickets for me and provide me with the reference number, please. 
Certainly, your reference number is GE1DNN0F. Is there anything else I can do for you today?
Yes, I also need some accomodations. Got anything with free wifi?
I have 32 results of lodging with free wifi. Could you be more specific on what area you'd like to stay in, or what type such as hotel or guesthouse?
Certainly! I'd like an expensive 4-star hotel, please. No guesthouses.
You have your choice of the Huntingdon Marriott or the University Arms.
I'll take the Huntingdon Marriott. Will you please book a room for 2 nights starting on Sunday for four people?
I've booked your stay at the Huntingdon Marriott for 4 people.
Great. All I need is the reference number for that reservation.
No problem. Your reference number for your room is Z1A3JS0N. Is there anything else I can help you with today?
That should be it, thank you!
Alright, have a nice day!