Query: user: I need to buy 1 ticket for a one way flight
assistant: where are you leaving from and where's the place you need to reach?
user: I'm departing from new york to land in chicago
assistant: when will you start your trip?
user: on the 4th
assistant: there's 4 options you may consider. american airlines has a flight leaving at 11:20 am for $180
user: okay. look for trains with flexible tickets to reach that place
assistant: do you want to depart on march 4th?
user: sunday this week is okay

Intent: Trains:FindTrains