昨日星期6學校要番學,但系我沒番到,所以我要寫家長信但系唔知點寫同唔知用咩理由,求解答?

Dear Mr / Miss / Ms xxx ,
I am writing to inform you that my son / daughter , _____(name) of _____(class) , was absent from normal lessons on _____(date) to inclusive.
His / Her absence is due to
_____(parents name)