Uber has named Expedia chief Dara Khosrowshahi as its new CEO, handing over the reins to him to turn around things for the troubled US-based cab aggregator. The 48-year old executive now has the herculean task of repairing Uber's image, boosting employee morale and turning business profitable for the world's most valued startup. Uber, in an email sent to employees posted on the company blog, said the "board has voted unanimously to appoint Dara Khosrowshahi to be our new CEO".