Trump says damage to Iran's nuclear sites is 'far below ground level'

European leaders are expected to hold talks with the Iranians on Friday as the world waits to see what President Donald Trump will decide on in regards to the conflict.

"Does the president have any hopes or specific expectations for the talks tomorrow between European foreign secretaries and their Iranian counterpart?" a reporter asked White House press secretary Karoline Leavitt.

"Well, certainly the entire world is on the president's side when it comes to the fact that Iran cannot obtain a nuclear weapon. This is something that pretty much all of humanity, except for the Iranian terrorist regime themselves, agree upon. And so the president expects that Europe will deliver that message directly to the Iranians," she responded.

Leavitt added Trump's "top priority" was ensuring Iran doesn't obtain a nuclear weapon.

ABC News' Mary Bruce asked Leavitt to clarify the president's statement that he would make a decision within the next two weeks.

"Is he saying that if Iran does not come back to the negotiating table within the next two weeks, that the president will strike?" she asked.

"The president is saying that he will make a decision whether or not to go within the next two weeks. It's very clear and direct," Leavitt said.

Bruce followed up asking if the president is seeing any hope for negotiations.

"That's why he said in the statement that I just read for all of you, based on the fact that there's a substantial chance of negotiations that may or may not take place with Iran in the near future, he will make that decision within the next few weeks," Leavitt said.

American Airlines has suspended flights to Doha, Qatar, and United Airlines has suspended its daily flight to Dubai, United Arab Emirates, as they continue to monitor developments in the Middle East.

"Due to conflict in the region, United’s daily flights between Newark and Dubai (DXB) are paused," United Airlines said in a statement Thursday.

-ABC News' Ayesha Ali

White House press secretary Karoline Leavitt, at the top of her briefing on Thursday, shared a message from President Trump regarding the Israel-Iran conflict.

"I know there has been a lot of speculation amongst all you in the media regarding the president's decision making and regarding whether or not the United States will be directly," Leavitt said.

"I have a message directly from the president: 'Based on the fact that there's a substantial chance of negotiations that may or may not take place with Iran in the near future, I will make my decision whether or not to go within the next two weeks,'" Leavitt said, adding that's a direct quote from Trump.