private function generateMessageBody($from, $number, $composeMessage)
    {
        $aux = [
            'from'           => $from,
            'to'             => $number['number'],
            'msg'            => $composeMessage,
            'callbackOption' => $this->callbackOption,
        ];

        if (!is_null($number['carrier'])) {
            $aux['id'] = $number['carrier'];
        }

        return $aux;
    }