In general, the subject matter described in this specification can be embodied in methods, systems, and program products for invoking a non-search action based on a search query. A server system receives a search query from a remote computing device. The server system determines whether the search query includes reserved text that indicates an intent by a user that provided the search query to the remote computing device to perform a non-search messaging action instead of or in addition to obtaining search results. The server system provides to the computing device, in response to determining that the search query includes the reserved text, code for causing the remote computing device to display a draft communication that includes at least the search query without the reserved text, and for allowing the user to edit the draft communication before transmitting the draft communication for receipt by recipient users.