YOU SAID:

I HAVE BURNT PIZZA I AM SO SAD ABOUT THIS.

INTO JAPANESE

ピザが焼けてしまったのですが、とても残念です。

BACK INTO ENGLISH

I am very sorry that the pizza was burnt.

INTO JAPANESE

ピザが焼けてしまい大変申し訳ございませんでした。

BACK INTO ENGLISH

I am very sorry that the pizza was burnt.