Wondering if anyone has seen an AppleScript that one could utilize by Messages' AppleScript handler that would:
Look at at incoming SMS and Messages
If message is NOT from 123-456-7890 then do nothing
If message is from 123-456-7890 reply with "personal message goes here"
I know nothing about scripting or coding etc. so any help would be appreciated.

MacBook Pro (Retina, 13-inch, Early 2013), OS X Yosemite (10.10.4)