我：你吃午飯了嗎？

朋友：還沒有呢，你呢？

我：我也還沒吃。要一起去吃點什么嗎？

朋友：好的，那我們找個地方吃飯吧。

How to say '你吃午飯了嗎？' in English:

Me: Have you had lunch yet?

Friend: Not yet, have you?

Me: No, I haven't either. Do you want to go grab something to eat together?

Friend: Sure, let's find a place to have lunch.