If only something like this existed in the Nintendo Power hotline days:
The system infers emotional states of human emotion based on vocal data. It calculates tone of voice as well as speech patterns to deduce what the emotional state of an individual is and makes decisions on how to proceed based on that information. The system will change its behavior, for example, what questions it will ask, how it asks questions and where it leads people according to the calculated emotions of the person on the other line. Besides reading emotion from this data, using a statistical method it interprets the intentions of the speaker as to whether or not they will continue carrying on the conversation.