昨天電話麵試，今天早上收到positive feedback。請問怎麽回複？

昨天和hiring manger電話麵試，早上收到公司recruiter的郵件，說feedback is positive. 還問我 “what did you think this opportunity?" 郵件裏還說 “we are still working on first round interviews so we won't probably have a clear "next step" for you until a couple of week." 

請問大家，我應該怎麽回複？謝謝。