Odwołanie spotkania

Jak napisać krótki sms z odwołaniem spotkania które miało odbyć się dzisiaj o 13tej? I had indicated meeting with you today on 1p.m., unfortunately I have to cancel it. Yours truly Prosze o poprawki :)

I regret to inform you that I have to cancel our meeting, due to personal reasons. albo I am sorry but I have to cancel our meeting today. Regards albo Apologies but I can\'t attend (have to cancel, have to postpone) the meeting at 13 dobra wystarczy i tak juz za pozno