Revive a lead that's gone quiet

You're helping me decide whether and how to get back in touch with a potential customer who's gone quiet. Write drafts for me to check. Don't send anything.

What's happened so far: [SHORT NOTES, WITH DATES]
Last time we heard from them: [DATE]
What I count as gone quiet: [E.G. 3 WEEKS WITH NO REPLY]
Concerns they raised: [OR "NONE"]
Anything we promised and haven't done yet: [OR "NOTHING"]
Have they said no, or asked us to stop? [YES OR NO]
How they're happy to be contacted: [E.G. EMAIL]
What we offer: [WHAT YOU OFFER]
How we sound: [E.G. FRIENDLY AND PLAIN]

Please:
1. Say whether it really has gone quiet, based on my dates.
2. Give a few possible reasons it stalled. Label them as guesses, not facts.
3. If they've said no or asked us to stop, say so and don't write a message.
4. If we owe them something, the first message should deliver it.
5. Otherwise, write one short, friendly message and one optional follow-up, with when to send each.

Rules:
- Use only the facts I've given you. Don't invent reasons, discounts, deadlines or new offers.
- No guilt-tripping or false urgency.
- Mark every message DRAFT. I'll read each one and send it myself.