Subject: [School] student interested in your work in [group]
Hi [First name], I'm a [year] student at [School] exploring investment banking. I noticed that you work in [group] at Morgan Stanley, and I'm interested in how analysts develop an understanding of the companies they cover. Through [a project or experience you actually completed], I've started learning about [specific topic]. I'd value your perspective on what that work looks like on a banking team. Would you be open to a 15-minute call sometime in the next two weeks? I'm happy to work around your schedule. Thank you, [Your name]