I’m very sorry about what happened.
I’m truly sorry about what happened
I’m sincerely sorry about this situation.
This situation should never have happened.
I agree that this kind of mistake is unacceptable.
What happened is unacceptable.
You have every right to be angry.
I don’t blame you in the least for being upset.
I totally understand your anger.
I’m as upset about this as you are.
Try to tell me exactly what you are upset about.
Let’s review exactly what happened.
Let’s take a close look at what actually happened.
Let’s go over the details of what happened.
Let’s see what can be done to remedy the situation.
I’ll do everything I can to remedy the situation.
Let’s concentrate on limiting the damage.
Let’s see how we can undo the damage.
Let’s focus on solving this problem.
Help me figure out how to make this right.
I want to solve this problem as much as you do.
What exactly would you like done at this point?
What exactly do you want me to do?
What would you like me to do about this?
How do you think we should proceed from here?
How can I best help you at this point?