Electronic device and notification method thereof

Electronic device in accordance with various embodiments of the present invention, when the notification display, and a specified displaying receiving a user command input module, a user interface event has occurred by executing a first application call to the display provided by the first application display the received user interface, may be when the call accepting command input by a user to a control module that controls to provide users with a conversation service over the first application. Further, it is possible other embodiments.