There are plenty of trains going to london liverpool street. Which city will you be departing from? There are 4 to choose from. The first one after 17:00 would be the TR4757, leaving Cambridge at 17:59 and arriving in London, Liverpool Street at 19:27. Would that do?
I need a train going to London Liverpool street and leaving after 17:00. Cambridge on Wednesday. Yes, that would work well. Can you book it for 5 people and give me the reference number, please?
{"__type": "Inform", "entity": {"__type": "Train", "arrive by": "19:27", "choice": "4", "departure": "Cambridge", "destination": "London", "leave at": "17:59", "trainid": "TR4757"}} {"__type": "Offer", "entity": {"__type": "Train"}}
{"__type": "NotifySuccess", "service": "train", "entity": {"__type": "Train", "price": "83 GBP", "ref": "HEDQCGXW"}}
Sure, it is all set. The reference number is HEDQCGXW and the total fee is 83 GBP payable at the station.