Can I cancel an order before it is delivered?

Excuse me, I was wondering if you could provide some clarity on the matter of cancelling orders. Specifically, is it possible for me to cancel an order before it has been delivered to me? I understand that there may be certain conditions or policies in place that need to be adhered to, so I'm hoping you could elaborate on those as well. It would be greatly appreciated if you could provide a clear and concise answer to this question. Thank you in advance for your assistance.