Dear Amy，
The purpose of my writing this letter is to give you a request. Because I heard you do purchasing in Japan，I happen to have a lot of things I want to buy that are imported from Japan，so I really hope you can do me this favor.
You know, it costs a lot to buy foreign products at home. I hope to save this cost to do more things, so I hope you can do a purchasing. Because you're in the heart of Japan right now，I think you can easily buy what I want to buy. I will not ask for the specific time, because it must be at your convenience. You told me recently that you were going to Japan for a trip, and now you have arrived, so I don't know how many more days you will stay. If you still need to stay for a month or two, I won't force it. All you have to do is buy it before you come back from your trip.First wish you had a nice trip. I need to buy three purchasing products. These three products are a，b and c. The prices of these three products are all below 1,000 yuan. If your yen is not enough, or your budget is not enough, You don't have to buy c products first. Because that product is not what I urgently need now, and the domestic price is not much different from the Japanese price. Both A and b products are very convenient to buy. I hope you must do me this favor. In the future, if you have any need for help, you can ask for it. I will do my best. If you think it's too much trouble or for some reason you can't buy it for me, I'll delegate.
I would appreciate it very much if you would grant my request. Looking forward to your early reply.