Okay. Where will you be departing from? What time do you need to arrive?
I need to take a train to cambridge, I will be arriving on Saturday. I will be leaving from London Kings Cross. I need to be there by 11:15 and I need a reservation for 5 people. Can you send me the reference number when you have made the reservations?
{"__type": "Request", "service": "train", "values": ["arrive by"]}
{"__type": "NotifySuccess", "service": "train", "entity": {"__type": "Train", "arrive by": "10:08", "destination": "Cambridge", "price": "94.4 GBP", "ref": "TVT0T8VJ", "trainid": "TR4824"}}
Ok, I've successfully booked your trip, on train TR4824, arriving in Cambridge at 10:08, the fee is 94.4 GBP and your reference number is TVT0T8VJ .