DearDiana,IunderstandEnglishintheclassroom,

but it is sometimes hard to understand America and British people.Can you help me?请写出你的建议，英文，不要太难，谢谢！

Dear Ms Diana,

I could understand most of English-speaking in the classroom. However, it is hard for me to understand the accent of different people whom are from different Countries. Could you please give me a favor?

Sincerely and Regards!

xxx(姓名）

以上就这样。写请求信要尽量用委婉礼貌的语气。至于你需要她如何帮助你，请追问后我再翻译。