That happened to Shea Serrano at George Bush Intercontinental Airport. To his surprise, he was helped for more than an hour by a patient worker.
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Serrano had quite the way of paying her back.
"I really thought it was a prank," Radelle Lofton said. "I didn't really believe it."
Lofton works for New South Parking at IAH. She's often called to help when someone can't find their car.
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"We were going up and down all the aisles trying to find it," she said.
When they found the car, Serrano wanted to leave a tip. He tweeted out the desire to leave a large tip, and within a couple hours, he raised about $2,500.
Serrano added more money and returned with a hefty tip of $3,000 in cash.
"I'm very thankful," Lofton added.