你确认真的要走吗？

Nǐ quèrèn zhēn de yào zǒu ma?

Are you sure you really want to leave?

我需要你的确认才能继续进行下一步。

Wǒ xūyào nǐ de quèrèn cáinéng jìxù jìnxíng xià yībù.

I need your confirmation to proceed to the next step.

我们还需要确认一些细节才能开始项目。

Wǒmen hái xūyào quèrèn yīxiē xìjié cáinéng kāishǐ xiàngmù.

We still need to confirm some details before starting the project.