After three hours of intensive talks, Irish leader Leo Varadkar, speaking at Liverpool John Lennon Airport, said it was possible for Britain and the European Union (EU) to come to a treaty by the Oct. 31 deadline.
"It is possible to come to an agreement to have a treaty agreed to allow the UK to leave the EU in an orderly fashion and to have that done by the end of October," he told reporters.
But Varadkar cautioned that there were still issues between both sides that need to be resolved.
The dollar index, which measures the greenback against six major peers, decreased 0.42 percent at 98.7074 in late trading.
In late New York trading, the euro increased to 1.1005 U.S. dollars from 1.0974 dollars in the previous session, and the British pound increased to 1.2444 dollars from 1.2211 dollars in the previous session. The Australian dollar rose to 0.6761 dollar from 0.6726 dollar.
The U.S. dollar bought 107.91 Japanese yen, higher than 107.54 Japanese yen of the previous session. The U.S. dollar increased to 0.9967 Swiss franc from 0.9959 Swiss franc, and it was down to 1.3297 Canadian dollars from 1.3330 Canadian dollars.