WordPress Cron Job in Bookly Plugin

Hell, Friends. I am using WordPress Bookly Plugin . I want to send emails to customers daily using cron. Plugin is aksing this words to me
”

To send scheduled notifications please execute the following script hourly with your cron: php -f
C:wampwwwmultan-academywp-contentpluginsbookly-responsive-appointment-booking-toollibutilssend_notifications_cron.php
“

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. Here, is the code for that file. What should I include or call here.

define('SHORTINIT', true);

/**
 * Class Notifications
 */

class Notifications{
    public function __construct()
    {

    }
}
$notifications = new Notifications();