Electronic device and operation method thereof

An electronic device comprising:

• a processor;
• and
• a memory operatively connected to the processor,
• wherein the memory stores instructions that, when executed, cause the processor to:
• select at least one data received through a user input;
• analyze text data included in the selected at least one data using morphological analysis;
• identify a substantive portion contained in the text data using the morphological analysis;
• embed the identified substantive portion contained in the text data;
• extract additional data including at least one of a word and a phrase having a greatest similarity with the identified substantive portion;
• learn an external language model using the selected at least one data;
• learn a personal language model using the selected at least one data and the additional data;
• adjust a first weight value for a learning result of the personal language model to be higher than a second weight value for a learning result of the external language model, based on the additional data being extracted;
• and
• provide response data using the learning result of the personal language model based on the adjusted first weight value.