Electronic apparatus and controlling method thereof

A controlling method of an electronic apparatus, comprising:

• receiving a user voice command from a user;
• based on the user voice command being received, generating response information by using at least one voice assistant of a plurality of voice assistants;
• displaying the generated response information;
• based on a predetermined voice command being received while a function corresponding to a first voice assistant is performed, activating a function corresponding to a second voice assistant according to the predetermined voice command;
• and
• wherein activating the function corresponding to a second voice assistant according to the predetermined voice command comprises:
• based on the user voice command being associated with activating the function corresponding to the second voice assistant identified by the first voice assistant, activating the function corresponding to the second voice assistant, and
• processing the user voice command by using the function corresponding to the second voice assistant.

A method performed by an integration engine communicating with a display device having a plurality of voice assistants, comprising:

• transferring, to the display device, a first command to activate a first voice assistant of the plurality of voice assistants;
• receiving, from the display device, a first request to determine a new voice assistant to be used by the display device;
• determining the new voice assistant to be used by the display device;
• and
• transferring, to the display device, a second command to inform the determined new voice assistant,
• wherein the determining the new voice assistant to be used by the display device comprises determining the new voice assistant to be used by the display device based on a pattern of using the plurality of voice assistants by a user of the display device.