In networking there is a great question you should to make sure people will give you referrals.
Here is the question:
“Bob, is there any reason you can think of that would make you uncomfortable in introducing me to (your target)? (you can add this, if you want). And it’s okay if there is…
Then wait for them to answer.
If they have a reason, then you work to solve it.
By doing this you are taking away pressure in the situation, and building a stronger relationship. It is extremely powerful.