Product delay email

Subject Line: ABCD – Product Delay

Dear [customer name],

We are very sorry that you still have not received the ABCD you purchased from our website.
The demand for this popular item has exceeded our expectations, and our stock is depleted. However, we will receive a new shipment next Friday, which we will expedite to our customers.
We understand that as a loyal customer when you make a purchase, you expect to receive your product promptly. We know that we have let you down, and for that, we are very sorry.
As soon as it becomes available, it will be dispatched for express delivery.

Again, we apologize for this inconvenience.