SEOUL, Sept. 7 (Yonhap) -- South Korea hopes to see an early resumption of denuclearization talks between the United States and North Korea, a senior official from Seoul's presidential office Cheong Wa Dae said Friday, one day after its envoy delivered a direct message from North Korean leader Kim Jong-un to Washington.

"We are hoping President (Donald) Trump and those with the power to make decisions and take some measures as we have delivered North Korea's message to the United States," Cheong Wa Dae spokesman Kim Eui-kyeom told a daily press briefing.

The remarks came one day after Chung Eui-yong, chief security adviser to South Korean President Moon Jae-in, held a telephone conversation with his U.S. counterpart John Bolton on the outcome of his one-day trip to Pyongyang the previous day as Moon's special envoy.

Chung has refused to disclose the details of the message from the North Korean leader but said Kim had personally asked him to deliver a message to the U.S.

The North Korean also expressed his faith in the U.S. president.

"(Chairman Kim) said his faith in President Trump remains unchanged. He made that clear," Chung said in a nationally televised press conference in Seoul on Thursday.

Chung's North Korea trip came amid an impasse in the denuclearization talks between the U.S. and North Korea that followed the historic summit between Trump and Kim held in Singapore on June 12.

Trump called off a North Korea trip by U.S. Secretary of State Mike Pompeo last month, citing a lack of progress in the North's denuclearization process.

North Korea was earlier said to have demanded a quid pro quo for its denuclearization steps taken so far.

Kim renewed his country's call for rewards in his meeting with the South Korean envoy this week.

"(Kim) strongly stressed that he may be able to take more active measures for denuclearization of North Korea should there be rewards for such pre-emptive measures taken by North Korea," Chung said.

The North Korean leader cited the recent dismantlement of his country's only nuclear test site in Punggye-ri and its only missile engine test facility in Dongchang-ri as "meaningful" pre-emptive steps taken, according to Chung.

In a recent interview with an Indonesian newspaper, published Friday, Moon noted a need to keep the denuclearization efforts moving forward, in exchange for early rewards if necessary.

"As a country directly involved in issues on the Korean Peninsula, South Korea will take all necessary measures not only for the development of the South-North Korean relationship but also for the development of the North Korea-U.S. relationship and acceleration of the denuclearization process," the South Korean president said.

Moon also vowed efforts to formally end the 1950-53 Korean War before the year's end, which is widely considered a reward also demanded by the North.

"As a practical way of building trust, it would be great if a declaration of the war that would mark the end of hostile relations on the Korean Peninsula can be made this year," Moon said.

When asked if the leaders of the two Koreas have agreed to press for a formal end of the war, the Cheong Wa Dae spokesman said they have not held any previous discussions on the issue, except in their two previous summits held on April 27 and May 26.

"I believe it is only that the leaders of the South and the North both share a view on the need to accelerate efforts to denuclearize the Korean Peninsula and also to establish peace on the Korean Peninsula," he said.

Moon is set to visit Pyongyang from Sept. 18-20 for what would be his third bilateral summit with Kim.

He is widely expected to meet with President Trump in New York the following week when the United Nations holds its annual general assembly.

Source: Yonhap News Agency