Dear Sir,
Wish you well.
I am afraid I will have to ask for several days' annual leave to take care of my husband who is going through a surgery tomorrow.
I will ask my team-mates to take care of the ongoing tasks at hand for these days so that clients are not impacted to the least.At the same time,I will have my mobile phone on so that anyone can give me a call if in need.
I am really sorry about this and thank you very much for your understanding in advance.
Best regards,
xxx