Dear [Recipient's Name], I hope this letter finds you well. I am writing to inform you that I am unable to keep our scheduled appointment on [Date] at [Time]. Due to unforeseen circumstances, I would like to request the cancellation and rescheduling of our appointment to a more convenient time. Please consider this letter as a formal notice of my request. I apologize for any inconvenience caused by this change in plans and assure you that I highly value our appointment and the importance of meeting with you. However, [explain the reason for cancellation, such as a personal emergency, sudden illness, unexpected work commitment, or any other valid reason]. I kindly request the following options for rescheduling our appointment: 1. Option 1: [Provide specific date(s) and time(s) when you are available for rescheduling, ensuring they are reasonably accommodating to both parties]. 2. Option 2: [Suggest alternative dates and times when you are available for rescheduling if the first option is not feasible]. 3. Option 3: [State any other alternatives for rescheduling, based on your availability and willingness to find a suitable new appointment time]. Kindly let me know your preferred option and any additional information needed to finalize the rescheduled appointment. I am flexible and willing to work together to find a new convenient time for both of us. Once again, I apologize for any inconvenience caused by this situation, and I appreciate your understanding and cooperation. I look forward to hearing back from you as soon as possible to reschedule our appointment. Thank you for your attention to this matter. Best regards, [Your Name] [Your Contact Information]