Dear Sir Reynold, 

Please excuse the absence of Anastasia Putri from school on 24th of August 2014. She was sick with fever. 

Thank you, 
(your signature)

semoga bermanfaat :)))
Dear sir,
     I am  very to tell you that i can't come to the school today because i am unwell. i have fever and cough. i went to the doctor this morning. the doctor gave me an injection and some pills and told me to stay in bad for a few days.
     i will be back at our school as soon as i am well

                                                                                           your faithfully

                                                                                             your name