President Donald Trump hosted Ukrainian President Volodymyr Zelenskyy for talks at the White House on Friday, with the U.S. leader signaling he's not ready to agree to sell Kyiv a long-range missile system that the Ukrainians say they desperately need.

Zelenskyy arrived with top aides to discuss the latest developments with Trump over lunch, a day after the U.S. president and Russian President Vladimir Putin held a lengthy phone call to discuss the conflict.

At the start of the talks, Zelenskyy congratulated Trump over landing last week’s ceasefire and hostage deal in Gaza and said Trump now has “momentum” to stop the Russia-Ukraine conflict.

“President Trump now has a big chance to finish this war,” Zelenskyy added.

Zelenskyy also said he had come to Washington with a “proposition” in which Ukraine could provide the United States with its advanced drones, while Washington would sell Kyiv the long-range Tomahawk cruise missiles.

Trump said he believed Ukraine was manufacturing “very good” drones but expressed reluctance about tapping into the U.S. Tomahawk supply.

“We need Tomahawks for the United States of America too,” Trump said. “We have a lot of them, but we need them. I mean we can’t deplete for our country.”

In recent days, Trump had shown an openness to selling Ukraine the Tomahawks, even as Putin warned that such a move would further strain the U.S.-Russian relationship.

But following Thursday’s call with Putin, Trump appeared to downplay the prospects of Ukraine getting the missiles, which have a range of about 995 miles (1,600 kilometers.)

Zelenskyy had been seeking the weapons, which would allow Ukrainian forces to strike deep into Russian territory and target key military sites, energy facilities and critical infrastructure. Zelenskyy has argued that the potential for such strikes would help compel Putin to take Trump’s calls for direct negotiations to end the war more seriously.

But Putin warned Trump during the call that supplying Kyiv with the Tomahawks “won’t change the situation on the battlefield, but would cause substantial damage to the relationship between our countries,” according to Yuri Ushakov, Putin’s foreign policy adviser.