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Canadian journalist Joanna Chiu was on a flight when she overheard a conversation between a man and a teenage girl sitting behind her.

She says the man started talking to the girl about her career plans, but went on to ask her for a "dirty photo".

That's when Joanna intervened. She alerted a flight attendant and the man was made to move seats.

She told ÃÛÑ¿´«Ã½ OS about the experience.

(Photo: Passengers seated on a plane. Copyright: ÃÛÑ¿´«Ã½).