HEY, I DID IT! THIS IS SUPER COOL!
After many trials and errors, here it is!!!!

Page4Button2Name=Elixir
Page4Button2Color=5
Page4Button2Line1=/cast 2
Page4Button2Line2=/cast 2
Page4Button2Line3=/g 63^5259^'֍ Elixir << 3Thoraf^1871160^0^-1^4095^1313051332^' %t >> 4 1424hp'
Page4Button2Line4=/say 63^5259^'֍ Elixir << 3Thoraf^1871160^0^-1^4095^1313051332^' %t >> 4 1424hp'
Page3Button10Line1=/say Test NPC dialogue link 4 %t'
NOTE: Keep the space after 4 input text or words you want, or command like %t then close bracket with ' and don't forget to add the squares at the beginning and end of the code line. 4 is the blue color text and also the dialogue code so anything you write in that space will be set in light blue and a text input if you click it!!! COOL!
Can replace %T with any text you want!!! It will trigger a text input if someone clicks the link ALSO which can be used super easily for questing and helping others say the right thing for quests, raids and npc interactions !!