A conversation user interface enables a patient to better understand their healthcare by integrating diagnosis, treatment, medication management, and/or payment, through a system that uses a virtual assistant to engage in conversation with the patient. The conversation user interface conveys a visual representation of a conversation between the virtual assistant and the patient. An identity of the patient, including preferences and/or medical records, is maintained throughout interactions so that each aspect of this integrated system has access to the same information. The conversation user interface allows the patient to interact with the virtual assistant using natural language commands to receive information and complete a task related to his or her healthcare.