NEW YORK :The U.S. dollar extended losses on Wednesday against major currencies, including the yen, Swiss franc, and euro, after economic data showed weakening labor demand, strengthening market hopes for an upcoming Federal Reserve interest rate cut. U.S. Labor Department data showed on Wednesday that job openings, a measure of labor market demand, fell more than expected to 7.181 million in July. Economists polled by Reuters had expected 7.378 million job openings in the JOLTS data. With the