这句话该怎样说

想表达"我们部门经理生病了，所以她让我替她来开这个会。" My manager xx is sick today. She asked me to step in. 请问这样表达地道吗，有没有更好的英语说法呢，谢谢大家。

My manager xx is sick today. She asked me to fill in for her.这句是不是也可以?

看你人设。我见过很正式的会，有人直接说，I am Ian, acting as xxxs deputy today, representing xxx function.

这句话怎么说取决于你参加（或者代为主持）什么会 和谁说这话

我可能会用 drive. I will drive this meeting. 或者是 host? 如果有约定好的 topic and agenda 就更简单了。

Represent就好了吧

就说某某is sick，你in charge the meeting不就行了？一定要按中文意思代替?那就说你是substitute好了

Unfortunately she is on sick leave today and can’t be here. She has asked me to attend in her place.

My manager xx is on sick leave today. I am asked to attend the meeting on her behalf.

谢谢大家的回复！学到很多！

My manager xxx is sick today. I'm sitting in for her. 上面有些回复太书面了，除非你参加的是非常重要的会议。