假如你是Richard,今天是父亲节.请给爸爸写一封信。信的内容必须包括如下两点： ①表达对爸爸的祝福和感谢；②给出至少两个理由说服爸爸同意你毎夭打半个小时的篮球。
要求：
（1）信中不得出现真实校名和姓名。
（2）条理清楚，意思连贯，语句通顺，标点正确：
（3）60-80个单词，信的开头和结尾已经给出，不计入总词数。

参考范文

Dear Dad,

     Today is Father’s Day. I hope you are happy and healthy every day. Thank you for everything you have done for me.

     I know you are worried about my study, so you don't want me to play basketball too much. But I can't study all day long, Sometimes I need to relax. I really enjoy playing basketball. It keeps me healthy. 

     Could you allow me to play basketball for half an hour every day? I promise I will try my best in my study.

Yours,
Richard