https://www.airspacetechnologies.com/blog/call-the-ball-how-is-your-logistics-communication
In response to the LSO’s query to “Call the ball,” the pilot will answer by stating his side number, aircraft type, ‘ball,’ and fuel state (and qualification number if in training).
Noting the information, the LSO would then respond, “Roger Ball.” The LSO would then only speak again if needed to correct some deviation… that in such a precision endeavor almost always happens.