假如你是报社的编辑Sigmund，收到了初三学生Peter的一封求助信．请根据来信内容，用英文写一封回信，帮助Peter解决问題．

Dear Sigmund，

    I had a quarrel（争吵） about my hairstyle with my mother the other day．She insisted that I should cut my hair short because of the coming zhongkao， but I wanted to keep it long．I dream of a long hairstyle，but don't want to hurt my mother． What should I do？ How can I persuade（说服） her？

Yours，

Peter

注意：

1． 文中不得出现你的真实姓名和学校名称；

2． 表达清楚，语句通顺，意思连贯，书写规范；

3． 词数不少于100．文章的开头已为你写好， 不计人总词数．

Dear Peter，

    It's a pity that you haven't come to an agreement on your hairstyle． But it's common for parents and teenagers to have different opinions．

___________．

Best wishes，

Sigmund