This command will create a 'close' button in the message window for the invoking
character. If no window is currently on screen, it will be created. This is one
of the ways to end a speech from an NPC. Once the button is clicked, the NPC
script execution will end, and the message box will disappear.

mes "[Woman]";
mes "I am finished talking to you, click the close button";
close;
mes "This command will not run at all, cause the script has ended.";