You ask for something and you get rejected. Sounds familiar?
If you are in the “self help” world, you just “motivate yourself” and “persist” and go and ask some more people. If you get rejected again, you “don’t give up” and you “walk the extra mile”.
Before you do all that, please think what is the cost for the other person to TOTALLY ignore you. If it is bordering zero, may be you have to first work on your identity and then go back to making requests.