我感到十分抱歉，但明天我真的有十万火急的事情要处理。
I am terribly sorry for it, but I do have something urgent to handle first.
先生，我真的对于这项错误感到十分抱歉，但是与其生气，你还不如应当想象。
Sir, I am really sorry for the mistake, but rather than getting angry, you should imagine this.
十分感谢您让我知道了在这方面我们存在的问题，对于在您身上发生的事情我们感到十分抱歉，我将会立刻为您解决这个问题。
Thank you for telling me this problem, I feel very sorry for what happened to you, I will take care of it right away.
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