How to check which target exactly AI reached?

Hello everyone! I have a simple AI behaviour, which brings the ball to player when he throws it away. So when AI reaches the ball, he takes it and goes to player. When reaching player, AI gives him the ball. So I have different behavoiur when reaching the ball and reaching the actor. I know about OnMoveCompleted, but I am not sure how I can theck the target AI has reached. Would be gald if anyone could help.