英语请假条，要标准格式。

To: XXX, XX Deparment

From: XXX

Date: YYYY/MM/DD

Subject: note for sick leave

Dear XXX,

I would like to know if I could ask for a sick leave for one day on YYYY/MM/DD.

I have a severe headacke, I hope I can go to hospital today, and I will try my best to finish my work tomorrow.

I will let you know the condition of my illness as soon as possible. I apologize for any inconvenience which may have caused you and thank you for your kind understanding in advance. Please contact me shall you have any further questions or concerns.

Best Regards,

XXX