Pompeo also brushed aside suggestions there's a difference of opinion between himself and President Trump, . over a timeline for North Korea to ditch its nuclear program.
US Secretary of State Mike Pompeo will visit North Korea on Sunday to meet with leader Kim Jong-un and try to push denuclearisation efforts forward, the State Department said.
"Of course, we have quite a ways to go but we look forward to the next steps in this conversation.
I repeated it but it was a comment that had been made by the leaders who had their inter-Korean summit in Pyongyang", Pompeo told reporters.
Ri Yong-ho, North Korea's foreign minister, said at the United Nations last week that "there is no way we will unilaterally disarm ourselves first".
Pompeo's visit to Pyongyang comes as North Korea is seen as toughening its negotiating stance.
Pompeo declined comment on negative signals from North Korea, that have included demands for a lifting of sanctions and complaints about Washington's apparent reluctance to agree to a declaration to end the 1950-53 Korean War without major concessions.
Asked whether the Trump administration was considering the lifting of sanctions, Nauert said that there had been "no change" in United States policy over the past few months.
"We want to take a different approach", she said.
The US has not publicly announced its position on an end-of-war declaration, hesitant to do so in the absence of substantial progress on denuclearization.
"I'm very happy to be going back to get another chance to continue to advance the commitment that Chairman Kim and President Trump made back in Singapore in the second week of June", Pompeo told a news briefing at the State Department.
Nauert said the meetings in Japan, South Korea and China were meant to brief counterparts on the talks in Pyongyang.
Pompeo stressed that in the meantime, . worldwide sanctions have to remain in place on North Korea, . and added there was unanimous support for the continued sanctions at the recent UN General Assembly.
Pompeo is set to visit Pyongyang on Sunday for nuclear negotiations, his first trip since an earlier one was cancelled by Trump over a lack of progress.
"I think the United States might have agreed to declare an end to the Korean War, but is wrangling with North Korea over the extent of (the) inspection the North should accept in the process of dismantling the Yongbyon compound", said Shin Beom-chul, a senior researcher at the Asan Institute for Policy Studies.
The meeting between Pompeo and Kim may also chart a possible second meeting between the two leaders.
The US secretary of state, Mike Pompeo, has backed away from a previously stated goal of North Korea giving up its nuclear weapons by the end of Donald Trump's first term in January 2021.