版本一：“Hi,I have bought this item at the price of $**, but now the newest price is $**,I have not receive the item yet , I wonder if could have a price match and refund ,thanks a lot”
版本二：Hello, I was very happy when I buy things from amazon, but to my surprise your price changed so quickly. My order number is __（ 订单号）__. My purchase price is _（购买时的 价格）_. Today, the price changed to _（现在 的价格）_. So I just wanna get a price protection.Thank you.