Information retrieval: An AI chatbot assistant app can help users find information on a particular topic, such as news, weather, or sports scores. The output result would be the requested information.

Task automation: An AI chatbot assistant app can help users perform tasks, such as scheduling appointments, setting reminders, or ordering food. The output result would be the completion of the requested task.

Overall, the output result of an AI chatbot assistant app is a response to the user's input, which can be in the form of text or voice interactions. The chatbot uses NLP and AI technologies to understand the user's request and provide an appropriate response.