I live in California and was traveling in Chicago for work. Last Friday night I flagged down one of their Prius cabs and was picked up by a driver who I later learned to be named Stella. I paid with cash but left my wallet in Stella's cab. I had no record of which cab I had taken and assumed the wallet was gone forever. To my surprise the next morning I got a call from one of my credit card companies who relayed a message from the driver to report she had my wallet and provided her home telephone number. I called the number, Stella answered, and within a few hours she came to my hotel and delivered the wallet back! She gets a five star review.
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