The United States, Russia and other stakeholders however want to see some form of transitional government take power in Afghanistan, but Ghani has insisted leaders can only be chosen at the ballot box.
Allies are waiting anxiously for new US President Joe Biden to decide whether to stick to that date -- but Blinken said the US was still mulling it over.
U.S. Secretary of State Antony Blinken on Tuesday pledged to rebuild and revitalise the transatlantic military alliance after a bruising four years when Washington portrayed NATO as outdated, divided and in crisis.
The first top U.S. official to visit NATO since President Joe Biden took office in January, Blinken said the alliance was at a pivotal moment but could emerge stronger after internal disputes over Turkey and Russian gas.
Turkey has been reportedly pushing to co-manufacture warplanes and missiles in Pakistan, which could potentially grant it access to coveted military technology from China.
According to President Recep Tayyip Erdogan, Turkey wants to improve cooperation with the United States on a "win-win basis", as he aimed to mend the strained relations between the two NATO allies.
In recent years, ties between the United States and Turkey have been enormously strained, with the former sanctioning the NATO member in December over its purchase of the Russian S-400 defense systems.
NATO defence ministers made no decision on whether or when to pull out of Afghanistan at a meeting on Thursday, Secretary-General Jens Stoltenberg said, adding that the allies faced a dilemma as violence increases again.