Lee said the issue was related to a passenger.
There was no issue with the plane, she said.
A LATAM spokesperson said a "disruptive passenger" forced the plane to return.
"The decision was made in line with established operational and safety protocols, designed to safeguard passenger welfare."
The aircraft arrived safely in Auckland and was "greeted by local authorities" to escort the passenger off.
"No harm was met by passengers or crew," the spokesperson said.
LATAM apologised for the inconvenience caused to other passengers on the flight. They were provided with hotel accommodation and a replacement flight.