8. A computer program product for topic guidance for a call between an agent and a customer, the computer program product comprising a computer readable storage device having program instructions embodied therewith, the program instructions executable by a computer to cause the computer to perform: creating a conversation model by learning a conversation pattern from a customer response to a conversation topic segment, a current state of the customer, and a context of the conversation topic segment; and suggesting a conversation topic for the agent to engage the customer in the conversation topic based on a customer response associated with the conversation model, analyzed conversation text the current state of the customer, and the context of the conversation topic segment.
8. A computer program product for topic guidance for a call between an agent and a customer, the computer program product comprising a computer readable storage device having program instructions embodied therewith, the program instructions executable by a computer to cause the computer to perform: creating a conversation model by learning a conversation pattern from a customer response to a conversation topic segment, a current state of the customer, and a context of the conversation topic segment; and suggesting a conversation topic for the agent to engage the customer in the conversation topic based on a customer response associated with the conversation model, analyzed conversation text the current state of the customer, and the context of the conversation topic segment. 10. The computer program product of claim 8 , wherein the suggested conversation topic is displayed in a decision-type tree of which multiple conversation topics are displayed with an expected customer response derived from the conversation model.