Translation of "我很遗憾。" in English

我很遗憾。

I'm sorry.

- 我很抱歉。
- 我很遗憾。

- I'm sorry.
- Excuse me.

我很遗憾您没有和我们一起来。

I'm sorry for your not having come with us.

我很遗憾每次离开的时候，都没有好好地道别。

Every time I leave, I'm of full the regret that I haven't fully said goodbye.