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I worked for one company for some time and quit the job myself due to some personal reasons. I decided to re-apply for the same position as my situation has changed. I was interview by the company 2 times (On the phone with HR and then in the office with managers) but still received an e-mail stating they are not ready to take me back in the team (The position is now relocated in another office, lots of things that might have influenced their decision, I don't even know).
The question now is: how should I answer their rejection e-mail without looking pitiful?