On Sunday, Secretary of State Mike Pompeo is headed to Pyongyang to set up the details for another meeting between President Trump and North Korean dictator Kim Jong Un. Pompeo has a hard road ahead of him and will be essentially playing wingman for a difficult but potentially important second date between the two leaders.

One key difficultly is that North Korea keeps changing its demands of Washington. Currently, Pyongyang says that another meeting isn’t enough and that Washington must prove its trust and seriousness (or is it love?) by reducing sanctions.

[Lindsey Graham: The 'love crap' between Trump and Kim Jong Un 'needs to stop']

North Korea’s argument stems from the vague terms of the original summit between Trump and Kim in Singapore earlier this summer. Kim had indicated that he would permanently dismantle his main nuclear site on the condition of “corresponding steps” from the U.S. to build trust.

Since then, what North Korea considers “corresponding steps” has kept changing, highlighting not only the difficulty in working with North Korea but also the need to hammer out clear commitments.

Previously, North Korea seemed to indicate that what it was looking for was a formal end to the Korean War. South Korean Foreign Minister Kang Kyung-wha, who has held his own meetings with Kim, has pushed for Pompeo to agree to it in exchange for a North Korea dismantling a nuclear site.

That exchange, however, has been called into question by North Korean state-run media which recently claimed that an end to the war should not be a bargaining chip in denuclearization. That stance indicates that North Korea might not be up for such an exchange, and wants more from the U.S. before taking action.

Indeed, at the United Nations last week, the North Korean foreign minister said, “the problem is that the continued sanctions are deepening our mistrust.” He further explained, “Without any trust in our national security, and under such circumstances there is no way we will unilaterally disarm ourselves first.” That’s a pretty clear indicator of North Korea’s stance.

Reducing sanctions, though, is a big ask, and one that Washington should be careful not to grant until North Korea has done more to prove that it isn’t playing games. Without sanctions, North Korea will be even less interested in sitting down for renewed talks and less likely to agree to solid commitments on denuclearization.

So far, North Korea has taken steps to return U.S. remains from the Korean War and seems to be interested in deescalating tensions along the demilitarized zone. These are good steps, but don’t have much to do with denuclearization. When it comes to that, North Korea doesn’t seem to be acting in good faith and continues work on nuclear facilities as well as efforts to conceal its capabilities.

Despite these complications, Pompeo is right to continue talks. His upcoming visit will hopefully allow him to better gauge what exactly North Korea wants in exchange for dismantling its facilities and then, on the basis of that assessment, determine if a second meeting with Trump is warranted.

Pompeo should also be skeptical. North Korea might just be leading the Trump administration on and playing for what it can get.