OK, do you know what day and time you're traveling?
I'd like to find a train please. I will be traveling on Wednesday and need to arrive in Ely by 9:30.
{"__type": "Request", "service": "train", "values": ["day", "leave at"]}
{"__type": "Request", "service": "train", "values": ["departure"]}
And where will you be departing from?