The dollar slipped at the start of Asian trading on Monday as hopes of a deal to reopen the Strait of Hormuz pushed oil prices below $100 per barrel, even as the Trump administration played down the chances of reaching an agreement with Iran soon. Against the yen , the US dollar was down 0.2% at 158.87 yen, while the euro rose 0.3% to $1.1642 and the British pound gained 0.4% to $1.3485.