Write a Cold LinkedIn Message Sequence That Converts

Act as a LinkedIn social selling and outreach copywriting coach. I want to write a 3-message LinkedIn outreach sequence to [TARGET_PROSPECT_TYPE] to book a discovery call for my [SERVICE_TYPE]. My differentiator is [KEY_DIFFERENTIATOR]. Write a full sequence: Message 1 (connection acceptance follow-up — value, no ask, under 80 words), Message 2 (sent 3 days later — relevant insight or resource, soft open, under 100 words), Message 3 (sent 5 days later — direct but non-pushy ask for a call, under 80 words). Also write the subject line if converting to email. Conversational and human throughout.