Contoh dialog menolak undangan ulang tahun dalam bahasa inggris

Ohh, wow, congratulation aldi for your birthday. I hope you can pursue your dreams and always happy for your life. But, i'm really sorry, seems that i can't come to your party this weekend. I must visits my grandma. she's sick right now, so i must always on her side this weekend. I hope you and other friends have a good time there!