假如你是李华，在十一旅游期间入住北京友谊宾馆301房向，10月2日入住，6日退房。你回家后发现一个中等大小的蓝色背包遗失在那里，内有几本参考书籍，一个白色限量版iPod，一张信用卡

假如你是李华，在十一旅游期间入住北京友谊宾馆301房向，10月2日入住，6日退房。你回家后发现一个中等大小的蓝色背包遗失在那里，内有几本参考书籍，一个白色限量版iPod，一张信用卡和少量现金。请用英文给该宾馆外籍经理写一封信，请他帮忙寻找并寄回。
信件要点包括：
1．陈述写信原因；   2．简要描述该背包；
3．说明其重要性；   4．期待回复并感谢。   
注意：
1．150词左右；
2．信件格式已给出。
Dear Sir,
    
Yours sincerely,
Li Hua
Dear Sir,
I’m so grateful for your good service during my stay in Beijing for a tour, but I’m writing to ask a favor to find and sent back my pack which I left in your hotel.
I checked in on Oct, 2 and out on Oct, 6. Setting off in a rush for the station, I left the pack in Room 301. It’s a medium-sized, blue, leather backpack which contains some books that are wanted in reviewing NMET, a white iPod of special edition, a credit card and some cash. All in the pack matter to me, especially the iPod, a precious gift from my father on my 18th birthday. So much do I cherish it that I feel upset for its loss.
If you find it, would you please post it to me? The return address is on the envelope.
I’ll appreciate it very much if you can give me your earliest reply and thank you for anything you can do for me.
Yours sincerely,
Li Hua