where to begin. Firstly the quote is wrong, it goes "And so, my fellow Americans: ask not what your country can do for you, ask (not but) what you can do for your country".
Secondly there is a spelling mistake: by (not be) Ronald Reagan.
Thirdly this quote was part of his inaugural speach, as opposed to before he was assassinated.
And lastly Ronald Reagan was not assassinated in some year, he was not assassinated at all.
Gees try and do a little reseach before you quote some bullshit please.