As I got to work in bigger and bigger companies, I started realizing that people are more likely to respond to you when you are clear on the scope of your ask, and what you are looking for.

You get a lot more done if it's an up front wall-of-text, and you put some limits to what you are asking. Doubly so if you give them an out by saying, you'll take a reference for a more appropriate person for the ask (i.e. help me navigate the org with your tribal knowledge).