你就放心吧，我们会千方百计找到他。

You may rest assured that we will do all we can to find him.

《牛津词典》

放心吧——你的背会毫发无损的——我来想办法。

Set thy mind at ease—thy back shall go unscathed—I will see to it.

youdao

“你放心吧，”狼说，“我会给你出个好主意。”

"Make yourself easy," said the wolf, "I will give you some good advice."

youdao

A lot of these people in the Mexican banks thought, well surely there will be a bailout if something bad happens; the government will pay for it, so let's run with it.

这使大批墨西哥银行家认为,如果出现危机,政府必定会出资援助,所以我们放心干吧 政府会买单的

耶鲁公开课 - 金融市场课程节选

And he says, "No, no, no. We're fine." "You know, We'll get there eventually."

但你的未婚夫说，“放心吧，我们找得到的。”“我们总会到目的地的。”

I'd better 课堂 - SpeakingMax英语口语达人