The 26-year-old actress gave out advice to the passengers via an iPad for an amount of USD 2, reported People magazine.
The "Beauty and the Beast" actress appeared on a screen in a makeshift advice booth, which had an "Advice From Emma Eatson USD 2" banner on the top.
Writer Derek Blasberg helped Watson carry out the social experiment which allowed strangers to (almost) speak face-to-face with Watson when they asked her various questions about life and love.