Hi @Marco_Martina, thanks for reaching out!
You can turn a Slack message into a task, add a message to an existing task and receive personal and project notifications in Slack. However, it’s currently not possible to link an Asana form to slack so every time you want to turn a slack message into a task, you need to fill out an asana form. Although I think this is a great idea!
I’ve gone ahead and moved your thread to the #productfeedback category to allow other users to upvote for this feature!