An example embodiment may involve obtaining an incident record relating to a user. The embodiment may also involve generating and providing, for display on a graphical user interface, a single window including a dialog region, an incident record region, and a suggestion region. The embodiment may also involve determining candidate messages by incorporating components of the incident record into predetermined message templates. The embodiment may also involve determining a scoring for the candidate messages based on a relevance to a conversation between the user and an agent. The embodiment may also involve based on the scoring, selecting one or more of the candidate messages to include in a set of suggested messages displayed in the suggestion region. The embodiment may also involve receiving input from the agent selecting one of the suggested messages, and then responsively displaying the selected suggested message as part of the conversation in the dialog region.