İzninizle, okuldaki kızımı almaya gitmek için toplantıyı terk etmek istiyorum. - With your permission, I would like to leave the meeting to go pick up my daughter at school.
Definition of with your permission in English English dictionary
with your approval, begging your pardon, if I may (opening phrase that shows deference to the person being addressed, as in "with your permission I will start the meeting")