Subj: Inquiry for a Ltr of Approval

Hi Prof [Name],

I pray this mail finds you in good spirits. I want to ask for a ltr of approval from you for my grad school application. I found your CS class this term to my liking, and I think your ltr would aid my application.

I found your way of tutoring and simplifying hard concepts amazing. Your passion for CS has kindled my own passion for this domain, and I'm grateful for all I'v learnt in your class.

I would find it an honor if you could author a ltr of approval for my grad school application. I know you might find it difficult to find additional hours in your busy day, so if you want additional information or anything to aid you in this task, I'm happy to assist.

Thank you for your thought and consideration. I look forward to your mail.

Sinc,
[Your Alias]
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