I resigned./I quitted my job./I've put in my notice.
我辭職了。

downsize
縮減開支；裁員；減小規模
The airline has downsized its workforce by 30%.
這家航空公司裁員30%。

A: Emily, could you spare a few minutes?
艾米麗，你能騰出幾分鐘嗎？
B: Sure. What do you need?
沒問題，你需要什么？
A: Well, I wanted to let you know that I've put in my notice.
恩，我想告訴你我辭職了。
B: Really? Why?
真的嗎？為什么？
A: It's complicated. But basically it boils down to one thing. This company is downsizing and I can't continue working for a company that may let me go.
原因很復雜，不過簡單說來這是遲早的事。這家公司在縮減開支，我不能等到公司解雇我我才走。
B: But surely they wouldn't fire you! You are one of the most experienced managers here.
可是，他們不可能解雇你！你是這里最資深的經理之一！
A: Well, to be honest, there's another reason. I've got a better offer.
恩，坦白說，還有一個原因，我有更好的選擇了。
B: Well, that's great news. Congratulations. Where will you be located?
啊，那可是個好消息，恭喜你，你要去哪里？
A: The head office is in New York, but I'll be dealing with overseas companies and flying to this side of the world from time to time.
那家公司總部設在紐約，不過我要打理和海外公司的買賣，會經常飛回來的。
B: It'll be sad to see you go, but it sounds like you've found yourself a great opportunity.
你要走的話我會很難過。不過看來你找到更好的機會了。
A: I have. I feel lucky. I look forward to dealing with overseas companies and at the same time having a chance to use English more.
是的，我覺得很幸運，我一直希望能同海外公司做生意，并借此機會鍛煉英語。
B: I'm sorry to bring this up now, but would it be possible for you to write me a letter of recommendation before you go?
我很抱歉現在向你提個要求，你在走之前可以幫我寫一封推薦信嗎？
A: Of course I can. In fact, if there are any other job opportunities at this new company. I'll recommend you personally.
當然可以。實際上，如果這家新公司有合適的工作機會的話，我個人會推薦你。
B: Thanks. I appreciate that.
謝謝，非常感謝。