From a friend or ex-colleague
Hi [their first name], I hope things are good at [their company]. I am applying for [role] ([link]) and would really value a referral if you feel comfortable. Why I think I fit: [two-line summary]. My resume is attached, and here is a short blurb you could paste: "[2–3 sentence blurb]" No pressure at all if it is not a good fit. [your name]