Delta passenger upset after being mistaken for human trafficking victim

"I was embarrassed at the airport," Ung said. "I didn't do anything wrong.... This whole experience pretty much has me traumatized."

Delta said its flight attendants "are trained to look out for signs of possible trafficking." Amid a campaign to stop human trafficking in Atlanta and beyond, some airline and airport workers have been trained to look out for such signs.

Delta said in a written statement the two women were "observed by another customer to not be in possession of their passports -- a possible indicator of a human trafficking event. Delta took the concern seriously and contacted the appropriate authorities who addressed the customers upon landing."

"While their investigation did show that our customers were not being trafficked, we train our crew members to remain alert and use their professional experience and practice best judgment to ensure the safety of customers," the airline said.

Delta also said: "We do not tolerate discrimination and are troubled by any accusations of discrimination. We have reached out to speak with our customers directly."

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Hartsfield-Jackson art exhibit focuses on human trafficking Delta flight attendants are trained to look for signs of possible human trafficking, but things can go awry when the suspicion is wrong.