辭職後想出e-mail通知客人, 應點打???

我都唔係好識寫，我試試：
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Dear XXX（客人名）:
Effective from DD-YY-2009（你o既離職日期）, I will leave XXXXX（公司名）. After my leave, my job will be taken up by XXX（接你手o個位同事o既名）.
Through these XXX（你serve o左呢個客幾耐就寫幾耐）, I was so glad to have chance to work for you and I am looking forward to our co-operation again in the future.
Regards,
XXXX（你個名）
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如果接你手o個位同事係新人，你可以o係 email 度話 o個位同事係新人，希望個客人o係呢段時間可以俾oD耐性佢（當然只限一oD好o既客人）；如果接你手o個位同事係oD好話頭繩尾o既人，你仲可以o係封 E-mail 度話佢係好 helpful，叫你個客人放心。