How do I reply back to this rejection letter for an RA position?

Anonymous
Hello Patricia,

I value the time you put into your application so I regret having to convey to you that after evaluation of applications, I moved to the next stage with other students.

There was strong competition for this position and it was important to make hard choices amongst all the high-achieving students. Again, I'd like to thank you for enabling me the chance to know what you can offer as a research assistant. If there are any other research projects that require additional hiring I will retain that information.

I'm not sure how to reply for it.

Updates
+1 y
I'm confused whether or not I should reply since he was my former professor
How do I reply back to this rejection letter for an RA position?
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