Dear asker,

I understand you're looking for an appropriate way to express apologies for a late reply to a business email. Here's a suggested way to convey your message:

```
Subject: Apologies for the Delayed Response - [Your Specific Subject]

Dear [Recipient's Name],

I hope this message finds you well. I would like to sincerely apologize for the delay in responding to your email. Please accept my apologies for any inconvenience this may have caused.

[Provide a brief explanation if necessary, for instance, "I was out of the office due to unforeseen circumstances," or "We were finalizing the details for our project proposal."]

Your email and its contents have not gone unnoticed, and I appreciate your patience. I am committed to addressing your concerns promptly and efficiently.

If there are any urgent matters or further questions you would like to discuss, please do not hesitate to reach out. Thank you once again for your understanding.

Best regards,
[Your Name]
[Your Position]
[Your Company]
```

In this response, make sure to:

1. Start with a clear subject line indicating the apology.
2. Address the recipient with a formal greeting.
3. Offer a sincere apology for the late response and acknowledge any inconvenience it may have caused.
4. Provide a brief explanation if it's necessary or appropriate.
5. Assure the recipient that their email is important and will be addressed.
6. Encourage further communication if needed.
7. Close with a professional sign-off, including your name and position.

I hope this helps you craft a suitable response that meets the expectations of business etiquette and communication. If you have any more questions, feel free to ask.

Best of luck in your endeavors!

Warm regards,
[Your Name] (on behalf of the AI assistant)