Held Ball or Travel?

[RefBob]

Girl's middle school game. A1 goes up for a jump shot. While both A1's feet are in the air B1 swipes at the ball and connects with a glancing hit on the ball. The ball is not dislodged from A1's grasp. In fact, the position of the ball in A1's hands is not really affected by the hit. A1 does not release the ball and lands back on the floor on both feet. In my opinion, B1's hit "caused" A1 to not release the ball but did not "prevent" A1 from releasing the ball. I call a travel. Coach is in my ear, saying "but B1 hit the ball." I say, that is true but that B1's contact on the ball was not sufficient to prevent A1 from releasing.

Did I make the right call?

Thanks.