编写一份200字的电子邮件，告诉你的老板你今天因为生病而无法上班，并说明何时可以回到工作岗位上。


生病日期：2021年9月15日
休假日期：2021年9月16日 - 2021年9月20日
Subject: Sick Leave Request

Dear [Boss Name],

I am sorry to inform you that I am unable to come to work today, September 15, 2021, due to sickness. I have been experiencing [symptoms] since yesterday and my doctor has advised me to take some rest and medication.

I would like to request a sick leave from September 16 to September 20, 2021, to recover and get back to my normal health. I have already informed my colleagues [if applicable] and completed my pending tasks [if applicable]. I will keep you updated on my health status and look forward to returning to work on September 21, 2021.

Thank you for your understanding and support.

Best regards,
[Your Name]