If you have CONFIG DIALOGUE turned on, you might notice something different next time you talk to a NPC that supports dialogue options. Specifically, you'll notice that all dialogue options now have a number prefix, such as in this example:

[1] say Hello!
[2] say Do you have work for me?
[3] say Goodbye.

You can now type in just that number to send the full command for that dialogue option!

As an example, if I had those above dialogue choices and entered 3, Aetolia would process my command as 'say Goodbye.'

Penned by my hand on Closday, the 7th of Lleian, in the year 480 MA.