Maza, Cristina (September 17, 2018). "U.S. May Give Ukraine More Lethal Weapons As Tensions Rise With Russia, Official Says". Newsweek.
June 18, 2019: DoD announces aid
https://www.defense.gov/Newsroom/Releases/Release/Article/1879340/dod-announces-250m-to-ukraine/
Call July 25, 2019
No aid released as yet
Sept 12, 2019
Aid released
I think Ukraine knew on July 25th that they had not received aid...