You have several ways to achieve this. For example, you can add a "condition" block > "subscribed" > "Less than" and set it to only send if the person has been subscribed for less than 5 minutes.

Another way is by adding a TAG. At the beginning of the flow, check if the person has this TAG. If they do, it means they are an existing customer, so direct them to live chat. If they don’t, it means they are new, so send them through the flow and add the TAG to ensure they are not redirected again in a future interaction.

muy facil , lo puedes hacer con las condiciones y etiquetas y te recomiendo un disparador mucho mas profesional como las vocales

Use conditionals, tags and rules.. =)