Dear [Recipient's Name], I am writing this letter to sincerely apologize for missing our appointment on [Date] at [Time]. I deeply regret any inconvenience or disappointment this may have caused you. Due to unforeseen circumstances, I was unable to attend the scheduled meeting. I understand the importance of honoring commitments and the value of your time, and I offer my sincerest apologies for not being able to fulfill my part. I understand that my absence without prior notice is unprofessional and disrespectful. Furthermore, I should have informed you in advance and taken necessary steps to reschedule our appointment or provide an appropriate explanation for my absence. Furthermore, I acknowledge my mistake and take full responsibility for the inconvenience caused. Please be assured that this incident serves as a learning experience for me, and I will take necessary measures to ensure this situation does not occur again in the future. Honesty, reliability, and punctuality are traits that I value deeply, and I am committed to upholding them in all my professional interactions. I highly appreciate your understanding and your willingness to reschedule our meeting. I assure you that I will make every effort to accommodate your availability to meet at a convenient time for both of us. Please let me know your preferred date and time, so we can arrange a new meeting promptly. Once again, I apologize for my oversight and any inconvenience caused. I greatly value the opportunity to work with you, and I hope this incident will not tarnish our professional relationship. Thank you for your understanding, and I am eagerly looking forward to rescheduling our appointment. Yours sincerely, [Your Name]