There are two ways that you can update your campaign template. Follow these steps to make an update:
First option is to go to campaigns > show templates
Select the template you would like to make a change to
Update the template with the new wording you would like to use. Then click save
The second option is to go to campaigns > show campaigns
Select the campaign that has the message you want to update
Click the campaign step, with the template you want to change
Click edit template
Make the update to the template wording you would like, and click save
Click save campaign step
Select save campaign
Either of these 2 options, will allow you to change your campaign message to say anything you would like.