[MudWalker] Trigger Scripting, help please

[Tim burke]

I know this may sound like a really simple question, but I cant for
the life of me figure out how to do this.  I want to have a trigger,
be able to extract text from that trigger, and use it on the commnad.

Example:
Input:
[name] has arrived.
Output:
say Hi [name], how are you?


Obviously thats not what I would be doing with it, but if I had that
much I can figure out the rest on my own.