In that case, just get a Rotate Vector node and assign the vector value as (x = 1, y = 0, z = 0). Then get the control rotation, split it to expose it’s components, also split the purplish-grey pin of the Rotate Vector node, and connect the control rotation’s rotation value around z axis into the exposed z (yaw) pin of the Rotate Vector node. Now you can use the result instead of the velocity vector and the rest is the same 
Oh and btw, if you want to control the dash-jump rotation using inputted movement direction rather than the camera direction, just use the input vector instead of the velocity vector.