What's The Signal

[rj]

In a HS girls FP softball game last night I was BU working with a very senior PU. A pitch came very close to hitting a batter; close enough for the coach to yell to her player "did you get hit" to which the player shook her head yes and pointed to her elbow. The PU told the coach he did not think the batter was hit so the coach yelled to me for a call and the PU motioned to me for what did I see. My question is; what signal do I give the PU to communicate that I did not think the batter got hit. I asked my PU after the game what the signal should be and he didn't know for sure. I'm only a second year ump so I want to make sure I get this right for the future.