I have a staff ticket from iberia without a confirmed seat, can I go with this 144 free visa?

My father is captain of iberia, we would like to meet at Sha airport because I am currently in kuala lumpur and fly together from there to madrid but my staff ticket is without confirmed seat until the check in. My father will be the captain of that flight. Can I go with this 144 hours free transit? I am not going to leave the airport. Thank you