Goal: Send a hello message to my friend Amelia Miller on the Messenger app.
Steps:
action: action_type: open_app
app_name: Messenger
step_instruction: Open the Messenger app.
action: action_type: click
step_instruction: Click on the chat of Amelia Miller.
action: action_type: click
step_instruction: Click on the Typing bar at the bottom of the screen.
action: action_type: input_text
text: Hello
step_instruction: Type in Hello.
action: action_type: click
step_instruction: Click on the send icon at the right side of typing box.
action: action_type: navigate_back
step_instruction: Go back. 
action: action_type: navigate_back
step_instruction: Go back.