There are 3 different ways that you can see and edit the "Julie" text messages.
Go to settings ⚙️ > all automations > then click edit on the automation that you want to edit.
Go to Funnels > my funnels > then click edit on the funnel that you want to edit.
Go to Ads page > find the ads you want to edit > and click on 'Edit Funnel'.
All of the above steps will bring you to the same place (the automation). 👇
Next scroll down until you see the actions that say 'Action: New SMS Message'
These are the text messages in the sequence that are sent out by the system. You can click on any of the messages to edit their contents.
You can also disable any of the messages you no longer want to send out by hitting the toggle (on the top right) switch it to the right of each action.