travelling alone under the age of 18

im planning to go to icmeler alone
and im only 17
does anyone know the procedure for the letter of consent that has to be written ?
what has to be included in the letter ?
and does the flight companies accept people travelling alone under the age of 18 ?
thanks
xxxxx
and im only 17
does anyone know the procedure for the letter of consent that has to be written ?
what has to be included in the letter ?
and does the flight companies accept people travelling alone under the age of 18 ?
thanks
xxxxx