Apology letter for belated reply to an Invitation

This is a sample apology letter for belated reply to an Invitation.

Dear Person_Name…………

Thank you for the invitation to your anniversary party. I would very much like to attend your party and hope that you can accept my response at this late date. However, please accept my apologies for this late reply.

Again, thank you so much for the invitation.

Sincerely yours

Your Name