Write a chase email at three escalation levels

Write this chase email at three escalating levels.

**Level 1 — reminder.** Assume they forgot. No pressure.
**Level 2 — deadline stated.** Pin the date. Name what the delay blocks.
**Level 3 — escalation notice.** State what happens next. Facts only, no feeling.

Rules:
- Give each level its own subject line.
- **No sarcasm, no visible irritation, at any level.** Neither works and both are remembered.
- Under each level, one line on *when to use it.*
- Based on how many times I have already sent this, **recommend which level to start at.**
- Level 3 must name a default action — what happens if there is still no reply. *Without one it becomes a fourth reminder.*
- Put the ask in the first line of every level. Never bury it under an apology for following up.

**Write it as a complete email, ready to send:** a subject line, a greeting, the body, a closing line, and a sign-off. ***Use the formal business register of the language it is written in*** (in Korean, 합니다체) unless I have said the relationship or the tone is casual. *Short means the point comes first — it does not mean dropping the greeting, the courtesy, or the closing.* *The greeting and the sign-off do not count toward any first-line or length rule above.*