  In the comment by Konig, Gefen, and Silva, their main point is to question
the approximation we used in solving the Green's function. They believe that
this approximative method is inappropriate to describe spin-flip-related
dephasing processes caused by intradot interaction, so they believe that our
conclusions are ill-founded because of that. We agree that we indeed used an
approximation in calculating the Green's function. However, we believe our
approximation to be reasonable and the main conclusion, namely, an intradot
electron-electron interaction can not induce dephasing, should hold. In
particular, we emphasize that we have taken the higher-order terms in solving
the Green's function than appeared in their previous publications. We will
compare the approximation used their papers with that in our work.
