What is an appropriate way to compose a sample email to a professor after a long period of time without contact?

Subject: Reconnecting and Seeking Guidance

Dear Professor Last Name,

I hope this email finds you well. I am reaching out after a period of time to reconnect and seek your guidance on specific topic or reason for reaching out. I value the knowledge and expertise you shared with me during our previous interactions and would appreciate your insights on specific question or request.

I understand if your schedule is busy, but I would be grateful for any time you could spare to discuss this matter. Thank you for considering my request, and I look forward to hearing from you.

Best regards, Your Name