sample
dear customer,
this is xx x.i am sending this message to update the status of your order. the information shows it was handed to customs on jan. 19. the tracking number is xxxxxx. you can check it on the website: xxx.
you may get it in the near future. i apologize for the fact that the shipping is a little slower than usual. hope it is not a big trouble for you.
best regards!
(your name)
参考译文：
亲爱的客户：
我是xxx，现在为您更新一下订单状态。信息显示，您订购的货物将于 1 月 19日入关。跟踪货运单号为xxxxxx。您可以在以下网址查询：xxx。
不久您就可以收到货物。对不起，货运时间比平常略长，我希望没有给您带来麻烦。
祝好！
(你的名字 )