Is Fiction Dialogue Different from Plain Old Yakking?

Dialogue through verbal speech is as important to your fictional characters as it is to us flesh-and-blood folks, though for somewhat different reasons. For both fictional and real people, speaking is the most common form of communication, and communication is, of course, not only vital but is something we humans do a lot.

However, real people engage in spoken dialogue for only a few reasons, and among them are:

to inform
to persuade
to establish a relationship
to argue
to direct or command

When our...