this.mass = 0;

if(this.game.variables.goalsScored == null) {
    this.say(['Please Help! One of my players need help in practice!']);
}
else if(this.game.variables.goalsScored == true) {
    this.say(['Thanks for helping them! I can send you to the next level now !!']);
}
else {
    this.say(['Oooff, Looks like they still need more help!']);
}