You drive your blade into the neck of the Andorian, killing him instantly. You hated to have to do it, but it was the only way.
You’ve gained the respect of the Andorians and made your first successful first contact. Humanity is now poised to begin their journey out into the stars. Years from now both humans and Andorians will be founding members of the great United Federation of Planets. The future is bright for humanity, the Andorians, and the entire galaxy. Well done Zefram Cochrane.
This isn’t the only path you could take however. There is Infinite diversity in infinite combinations. Why not go back and forge another future for humanity?