I am very happy and grateful to you for inviting me to your party. But I'm sorry I can't attend. Because my friend Tom is ill. He can't move by himself at all. He stays in bed all night. It seems that he has a high fever. So I have to take him to the hospital. I can't come to your party tonight.
Happy birthday to you, my dear friend. I'm sorry that I can't accompany you on this special day. I hope you can understand me and enjoy this party.
sincerely
Jimmy (member of extra band)
Dear chuck.
I am very happy and thank you for inviting me to your party. But I'm very sorry that I can't attend your party. Because my friend Tom is ill. He can't move in bed at night It seems that he has a high fever. So I have to take him to the hospital, and I can't come to your party tonight.
Happy birthday, my dear friend. I am very sorry that I can't accompany you on this special day. I hope you can understand me and have fun.
sincerely
Jimmy (member of extra band)
I hope I can help you. If you have any questions, ask me.