Написать записку с извинениями, что забыл о дне рождении

Hi!!! I'm so sorry, I've forgotten about you birthday. So , didn't come yesterday because my little brother has caught a cold, and I had to take an eye on him! That's why I want to go with you to have a dinner at 3 o'clock. I will be free, coz my dad will go with my brother to a hospital. Can you go with me to a meal??? Best wishes, Marie