Help In 5700

I need Help

Iam anew man in this server and iam good in 5095 But the new server versions i'm not good in it
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i dont know how to change Npc Text to what i need

Look

the NPC say For example " Hello Iam Here To ....."
i need To change his Text
iam changing his text to this
"Hello Every One ......"
and restarting the Game
then i speak to the NPC
i found it say the last text which i dont need it ( " Hello Iam Here To ....." )

i dont know how to change Npc Text to what i need

please Heeeeeeeelp