作为一名沃尔玛电商平台卖家顾客没有收到他的快递请帮我写一封英文邮件安抚顾客表示我们愿意提供两种方式一是：再次给他邮寄一个商品。 二是：请他耐心等待48小时如果该包裹仍未找到我们会为他全额退款。

Dear valued customer,

We are sorry to hear that you have not received your package from us. We understand how frustrating this can be and we want to assure you that we are doing everything we can to resolve the issue.

We would like to offer you two options for resolution. Firstly, we can send you a replacement item promptly. Alternatively, we kindly ask for your patience and understanding for the next 48 hours, during which time we will continue to track the original package. If it is still not located after this time, we will issue a full refund to you.

Please let us know which option you would prefer. We apologize for any inconvenience this may have caused and thank you for your continued support.

Best regards, [Your Name