Olha Stefanishyna, who was appointed by President Volodymyr Zelenskyy as Ukraine's ambassador to the US at the end of August, told DW that the meeting between Zelenskyy and US President Donald Trump on the sidelines of theUnited Nations General Assembly was "the longest and most thorough" meeting the two leaders had had.

According to Stefanishyna, the meeting covered many issues, including briefings on the military and economic situations, as well as the management of frozen Russian assets and a discussion about a mineral deal.

When asked about the unexpected change of Trump's position, who stated that Ukraine could regain its territory from Russia, she answered that there has been a major shift because both sides have come a long way.

"I have a sense that President Trump trusts President Zelenskyy," she said. "And it probably won't be possible if all this hadn't been happening before this meeting."

The dialogue about the security guarantees for Ukraine is "going really well," according to Stefanishyna. "My president says is that contribution of the United States to these security guarantees is really vital and important."