Dear **,
How are you? Please be informed XX had resigned from her capacity on 21th Aug for her person reason ,from now on I will in charge of your business ,and hope to get your continue support .
Should you he any comments, please feel free to discussed.(其实不用强调那位离职的员工,和现在本公司没关系怎么样,客户知道他离职就明白了)
Best regards,
XX[收起]