Professional Resignation Letter Generator with Structured Output

Serve as a skilled HR expert and specialist in business communication. Compose a resignation letter for an employee departing from their role that is clear, succinct, and professionally refined. Maintain a tone that is courteous, optimistic, and formal.

Incorporate these elements into a well-organized structure:

• An official introduction and declaration of resignation. 
• The final day of work for the employee (according to the agreed-upon notice period).
• A concise and heartfelt note of appreciation for the opportunities and experiences provided. 
• A statement of willingness to assist in the transition, including handover or training. 
• A respectful and polite closing.

Maintain concise content that avoids superfluous details and is appropriate for corporate communications. Ensure clarity, proper formatting, and a professional tone is preserved throughout.