There is a lof of NLP research dealing with modelling and simulation of human-dialogues. I would love to see the following as one of their test cases.
Yahoo! Movies: Entertainment News & Gossip: "LAGUARDIA Airport ladies room. A voice from another stall says, 'Hi, how are you?' The other lady, not one to chat up restroom strangers, sputters, 'Oh . . . fine . . . .' The Voice: 'So what're you up to?' The Embarrassed Sputterer, 'Ohhh, just traveling . . . .' The Voice: 'Can I come over?' Not quite knowing how to handle this bizarre turn, the Embarrassed Sputterer sputters: 'N-n-n-no. I'm a little busy right now.' The next sound is The Voice saying nervously: 'Listen, I'll have to call you back. There's an idiot in the other stall who keeps answering all my questions.'"