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。