You can send a saved template by doing the following: Select the contact you would like to send your message to.
Scroll down and click on 'Send Message':
At the bottom, click on the little chat bubbles (when you hover your cursor over it it will say 'Open Message Template'):
Click on the template you want to use:
Your saved template will be copied into the text box for any personal edits you would like to make and click "Enter" or the paper airplane icon in the text message box to send the your message.