Prevent future mistakes
As a final step, explain what steps you plan to take to ensure the mistake doesn't happen again. This demonstrates your commitment to improvement and helps rebuild trust.
End by asking for input on your plan. The other side might have valuable insights that allow you to better avoid the mistake in the future. That said, you might want to skip asking if the affected party is your customer. It might be inappropriate to ask them for advice on how you should do your job better.
Which of these statements best demonstrates commitment to preventing future mistakes?