A system and method for using one communication mode, such as instant messaging, to initiate and manage an alternative communication mode conversation. In one exemplary embodiment, an automated agent transfers conversation participants from an instant messaging conversation to a voice conversation by accepting an instant message command from a conference organizer and interacting with a voice conversation platform to call the instant messaging conversation participants on the telephone. One or more conversation participants can manipulate the conversation via commands to the automated agent using the first communication mode.