If you need to make a request, just speak up and ask. Just phrase your request clearly, simply and concisely. And if you don't get what you asked for, understand that a ‘no’ to your request doesn't mean a ‘no’ to you - because you are...

When someone makes an unreasonable request, how do you respond?  Do you say no, not possible? Mostly, what works is a clear and confident no.  But you may want to give a little explanation of why you're refusing their current request, without over explaining your reasoning....