Я бы приложил из документов свой слип и вот такую сопроводиловку. I am kindly asking to approve the special permission request for my mother as she fully qualifies the family reunification requirements (First Degree Kinship: spouse, children, parent). Grandkids are also waiting for her. It would be nice to have this permission on or before 24-08-2020 as Cyprus Airways have scheduled the flight on that date. Thank you!

Большое спасибо! Попробую с таким сопроводительным письмом