Help me in making my APP

Hi Friends! I want to make a app but I am unable to understand that what I do . ACN someone help me? Below is the details of which type of app I want.

When Screen1 open voice recogniser come and if voice recogniser listen ‘hi’ then text to speech converter will say ‘hello’ and then navigate me to another screen2.

Please can someone help me.

That is not how an assistant work, but here is an example I found on the web. Evaluate as needed

Try this
Assistant.aia (2.5 KB)