hemanshudhuria
First, research about the professor whose subject interests you the most. Make sure your qualifications are impressive even before you join the school. Pick a professor whose work you admire and learn a bit about what they do.
Introduce yourself briefly and talk about your background. Explain why their work made you want to reach out to them. Mention your reasons for contacting them, and talk about your own project or how you know the particular alumnus.
Professors want to see that you can add value to their research. So, mention your skills or qualities that you think can help their work. Then, say that you were advised by [Alumni’s Name], who spoke highly of the professor’s work and mentorship. Finally, thank them and express your interest in meeting them in person.