该如何委婉表达“辞职”？

It's all for personal reasons!

都是出于个人原因！

resign/rɪˈzaɪn/辞职

resign from/as...辞职；辞去（某职务）

He resigned as manager after eight  years.

八年后，他辞去了经理的职务。

She resigned from the government last week.

上个星期她辞去了政府部门的工作。

resignation/ˌrezɪɡˈneɪʃn/辞职信

quit/kwɪt/辞职

insomnia/ɪnˈsɑːmniə/失眠

migraines/ˈmaɪɡreɪn/偏头痛

force sb to do逼迫某人做...

A: Sir, I want to resign from my Sales Manager job. Here is my resignation letter. 

先生，我想辞去销售经理的工作。这是我的辞职信。

B: Why are you quitting so suddenly? Do you have any complaints against the company?

你为什么突然提出辞职？你对公司有什么不满吗？

A: No, it's all for personal reasons. I've been feeling too much pressure recently. I have insomnia and migraines. 

不，都是出于个人原因。一直觉得压力太大，最近我有失眠和偏头痛。

B: In that case, I won't force you to stay. I hope to work with you again in the future. 

如果那样的话，我不会强迫你留下来。我希望以后能再次和你合作。