Alaska Airlines flight attendant saved a girl from a human trafficker by leaving a message in the plane toilet, BBC reported.

Sheila Fedrick told reporters that she got worried immediately when saw a teenage girl sitting next to a well-dressed older man aboard the plane.

Fedrick attempted to engage the young girl in conversation, but the man did not allow it to talk to the girl.

Then she said she took action by leaving a message on a mirror and the girl wrote back on the note and said that she needed help.

 Fedrick notified the pilot and when the airplane landed in San Francisco, police were waiting for the man.

The incident, which occurred in 2011, was published in media this week while the charitable organization Airline Ambassadors launched a campaign to train crew members fight against human trafficking.