If you've ever chased that elusive five-star rating on the Uber app , you're not alone. The company's CEO doesn't have a perfect score. Dara Khosrowshahi said in an interview on Molly O'Shea's Sourcery, published Friday, that his Uber rating is 4.83. "My Uber rating is like 4.83," the CEO said. "I gotta get to 4.9." That's a little under the average Uber rider rating of 4.89, according to a company blog. Uber has said that it gives ratings to drivers and riders to ensure safety and