Need help with talk trig

[imnewnotnoob]

Does anyone know how to make an Ability where if you use it on a person, it'll bring a random message u want it to say...lets say i want it to say 3 things...Well it will random those, and i want to know how to set it where if you talk to a specific unit, it'll say one message u want, but it is the SAME unit...Do I make a New Unit but all same stats and art? and then if you use the ability on the guy created customly itll put the message you WANT it to say? First...Need to know HOW TO make the Ability

Then The Trigger With Unit who is like ALL others.

Then The Trigger With Specific Unit Like Others but Only says 1 and/or different message

Respond Please I will wait...and wait...ok sorry please answer