# W5 | openai/gpt-5.6-luna | run 2

## Prompt

Write an apology email to a client. We missed the agreed delivery date by a week due to an internal mistake (not their fault); the client is frustrated. Be sincere, take responsibility, offer a concrete next step, don't grovel. Under 130 words.

## Response

Subject: Apology for the Delayed Delivery

Hi [Client Name],

I’m sorry we missed the agreed delivery date by a week. The delay was caused by an internal mistake on our side—not anything you did—and we take full responsibility.

I understand your frustration, especially since you were relying on us to meet the original timeline. We’ve corrected the issue and are completing the final checks now. We will deliver [deliverable] by [specific date/time] and provide a status update by [earlier date/time].

Thank you for your patience. I’d welcome a brief call if you’d like to discuss the delay or any impact it has caused.

Best,  
[Your Name]
