Sms notes, need help

1. Automate Community
2. Productivity

I'm trying to make a flow that takes notes through SMS,

The idea is that when someone SMS "@(note title here)" the flow will respond if the note exist.

If the note don't exist, the flow will ask for a message/reply that will create a new note.

I have started making the flow, I have a few problems,

1. The flow looks for "@" to determine when someone is asking for a note, if someone sent a email it would trick the flow.

2. I want to be able to create a note from a SMS that looks like this "@(note title here) - (note msg here)