TOKYO :The buoyant dollar slipped a notch on Friday at the end of a holiday-thinned trading week, while the yen hovered near a five-month low as traders chewed over contrasting messaging from a hawkish U.S. Federal Reserve and a cautious Bank of Japan. Traders are betting U.S. rates will remain elevated for longer, sending Treasury yields higher in recent weeks and in turn boosting the dollar against other major currencies. The U.S. dollar index, which measures the greenback against six