Solve the riddle:
People walk in and out of me. They push and I follow. When they walk out on me, I close up and I stay waiting for the next person to walk into my life when I have a more open mind.
What am I?

Below you will find a hint and the correct answer to the riddle.
Little hint:
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Hint: El*v*t*r
Right answer:
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Answer: Elevator.