When the soviets blockaded berlin and refused to allow food and supplies to be transported from the west into the city, president truman responded with flights of cargo planes carrying food and supplies into west berlin in what is now known as the berlin air lift?

Correct. The Berlin airlifts brought essential supplies and food to the citizens of Berlin while it was being blockaded by the Soviet Union in 1948-1949 in the years after the conclusion of World War II. It was one of the first standoffs between Western allies and the Soviet Union in what became known as the Cold War.