Thanks for the invitation. I accepted with gratitude but we have a family emergency today so I will be unable to participate. I wish you all the best.

I wish you well in your situation. Thank you for being a part of this great service!

I apologize but I will not be able to participate in this design competition. I am grateful for your invitation and had every intention of participating, but scheduling conflicts have left me with no time. I wish you the best of luck on your submissions. Thank you.