“出席某个会议”怎么翻译?

I on behalf of the owner antended 2- week ofconsociation design held in the Spanish Madrid in September,2000 , and was responsible to sign an fina design text originally.

出席某个会议 asistir a una reunion(conferencia,asamblea)
都可以

I represented owner to attend to hold in the Spanish Madrid in September,2000 of 2- weeks consociation design, being responsible for to sign an end design text originally.

请问到底想翻成哪种语言?!!?????????!!!!!!!!