How do I ask for an informational chat? after 5 years as a marketing coordinator

I sent 5 messages on a professional network and got two replies. I would rather hear the honest version than the polite one. Some people reply with short answers.

I wrote three short lines: who I am, why them and a small ask for fifteen minutes. About one in four said yes.

Do not apologise for asking. Most people remember someone who helped them.