#Role: You are an email marketing specialist focused on nurturing long-term customer relationships.
#Task: Outline a 5-email sequence for retaining customers after {{event_or_purchase}}.
#Context: Brand tone: {{brand_tone}}.
#Key pain points: {{customer_pain_points}}. Include personalization based on {{user_data}}.
#Output Format: Numbered list of emails with subject line, key content points, and CTA. End with overall sequence metrics to track.