英語輔導：延遲交貨

Delay in Delivery
We were glad to receive your order(PO NO.:......) of .......(date). Because of the exceptional demand for ......, we are at present out of stock.
However, after checking with our production department, we can definitely guarantee you that we will deliver the goods to you before .......(date). If you could wait until then, we’ll give you the first priority on the shipping schedule.
Please let us know your decision. We assure you of our best services at all times.