Changing Voices In SAPI5

Question

I want to add more voices in my program where I am using SAPI5. Is there any way using which I can change its voice to of the Microsoft voices already available.

import win32com.client
speaker = win32com.client.Dispatch("SAPI.SpVoice")
speaker.Speak("Hello, it works!")

I want to add more voices because I want a female voice to speak instead of the default male voice which sounds very robot like.