A friend who lives in a different city has invited you to his/her daughter's 8th birthday. However, you can not accept the invitation due to some personal reasons.

I hope this letter finds you well.

Thank you so much for inviting me to your daughter's 8th birthday party. I truly appreciate the gesture and am honored to be included in the celebration.

Unfortunately, due to some personal commitments that have recently come up, I regret to inform you that I will not be able to attend the birthday party. I hope you understand my situation and know that I would have loved to be there to celebrate with you and your daughter.

However, I would love to make it up to you by meeting up some other day. Perhaps we can plan a day out together or have a small get-together to catch up. Please let me know when you are available, and I will do my best to make time to meet you.

I look forward to hearing from you soon and hope we can arrange a meeting soon. Wishing your daughter a very happy birthday in advance!