Ghost Operators

The first elevators used human operators.
They pulled levers to open and close the doors, or to lower or raise the car.
Then came automatic elevators that had buttons to select floors, automatic doors with safety bumpers, and no other controls.
People didn’t quite adjust to the new elevators. They looked for human operators.
Instead, there were voices in each elevator that welcomed the passengers and invited them to push buttons.
No, they were not on tape. These were the ghosts of the elevator operators.
People became more comfortable with the automated elevators.
Their purpose fulfilled, the ghosts moved on.