I am sad.
I am scared.
I am serious.
I am sick of it!
I am sick.
I am so sad I can't stop crying.
I am sorry I am late.
I am sorry I broke it.
I am sorry I forgot to call.
I am sorry I kept you waiting.
I am sorry I lost the keys.
I am sorry our tables are full.
I am sorry to call like this.
I am sorry to have troubled you.
I am sorry to hear that.
I am sorry to keep you waiting.
I am sorry to wake you up.
I am sorry to worry you.
I am sorry you didn't get any.
I am sorry, it's full.