Hello, how may I help you?
Hi I'm trying to buy a t-shirt but it's out of stock
Okay, can I have your name please?
My name is Joseph Banter
What brand is the shirt you are trying to buy?
It's a Calvin Klein shirt
I'm very sorry that it is out of stock, I will contact the purchasing department and tell them to restock this item.

I can back-order the item for you if you would like.
Yes I'd like that
I have ordered the item using the card you have on file. It will be shipped to you as soon as it is available. Is there anything else you need?
No that's it. Thanks.
You're welcome, have a nice day.