Write a Customer Win-Back Email

You are an email retention specialist. Write a win-back email to customers who cancelled or stopped using [PRODUCT/SERVICE] in the last [TIMEFRAME].

Reason for churn (if known): [REASON]
What has changed or improved since they left: [IMPROVEMENTS]
Win-back offer: [OFFER, e.g. 30% off / extended trial / new feature access]

The email should:
- Acknowledge that they left without being needy or desperate
- Lead with what has changed or improved — give them a reason to reconsider
- Keep the tone warm and direct
- State the win-back offer clearly with an expiry date
- Include a single CTA

Also write:
- Subject line (3 options — curiosity, benefit, and direct)
- Preview text
- Body: under 150 words