"We are well into a diplomatic process, and we hope - indeed, we want - to see this through to a successful end", Pompeo said this past week.
"Without any trust in the United States, there will be no confidence in our national security and under such circumstances, there is no way we will unilaterally disarm ourselves first".
Instead of addressing the North's concerns about the absence of a peace regime on the Korean Peninsula, Ri said, the USA has insisted that denuclearization come first and increased pressure through sanctions.
United States President Donald Trump on Saturday said his relationship with North Korean leader Kim Jong-un had improved because "we fell in love", Reuters reported. The North insists it needs reciprocal concessions from the United States, including the lifting of crippling economic sanctions and an official declaration that the 1950-53 Korean War has ended.
"The US insists on the "denuclearisation-first" and increases the level of pressure by sanctions to achieve their objective in a coercive manner, and even objecting to the 'declaration of the end of war, '" Ri said.
"The perception that sanctions can bring us on our knees is a pipe dream of the people who are ignorant about us. But the problem is that the continued sanctions are deepening our mistrust", Ri said. "I was really being tough - and so was he - and we would go back and forth, and then we fell in love, okay?" "And then we fell in love". "He wrote me handsome letters".
"Why has President Trump given up so much?"
He joked about criticism he would get from the news media for making a comment some would consider "unpresidential" and for being so positive about the North Korean leader.
'The missiles and rockets are no longer flying in every direction, nuclear testing has stopped, some military facilities are already being dismantled, ' Trump said.
Pyongyang has repeatedly appealed for United Nations and USA sanctions to be lifted and has support from Russian Federation and China.
He noted that Jong-un is interested in a second meeting after their initial summit in Singapore in June, after which Trump claimed it made huge strides towards the denuclearisation of North Korea.
By contrast, Trump in his remarks to the assembly on Tuesday, thanked Kim "for his courage and for the steps he has taken".
North Korea's top diplomat did not mention Trump by name during his speech, nor did he offer him any praise or credit for the summit or warming of relations.