diff --git a/talk.py b/talk.py
index 93a7930..8e51fc8 100644
--- a/talk.py
+++ b/talk.py
@@ -1,7 +1,8 @@
-from connection import *
-
 import sys
 import openai
+from openai.types import *
+
+from connection import *
 
 
 class Talk:
@@ -11,24 +12,23 @@ class Talk:
     top_p: int = 1
 
     @classmethod
-    def main (cls, message: str) -> None:
+    def main (cls, message: str) -> str:
         openai.organization = OPENAI_ORGANISATION
         openai.api_key = OPENAI_API_KEY
 
-        print (cls.__get_answers (message)[0])
+        return cls.__get_message (message).content
 
     @classmethod
-    def __get_answers (cls, message: str) -> list[str]:
-        return openai.Completion.create (
-                engine = 'text-davinci-002',
-                prompt = message,
-                max_tokens = cls.max_tokens_count,
-                n = cls.temperature,
-                stop = None,
-                temperature = cls.temperature,
-                top_p = cls.top_p).choices
+    def __get_message (cls, message: str) \
+            -> chat.chat_completion_message.ChatCompletionMessage:
+        return openai.chat.completions.create (
+                model = 'gpt-3.5-turbo',
+                messages = [{'role':    'system',
+                             'content': 'すべての語尾に「ぬ゛ん」か「だぬ゛ん」をつけて質問に短く答えてください。定期的に「ぬ゛ぅ゛ぅ゛ぅ゛ぅ゛ん゛」、「ﾎﾞｯﾁﾁｬｰﾝ」、「あっ」のいずれかを発してください'},
+                            {'role':    'user',
+                             'content': message}]).choices[0].message
 
 
 if __name__ == '__main__':
-    Talk.main (sys.argv[1] if len (sys.argv) > 1 else '')
+    print (Talk.main (sys.argv[1] if len (sys.argv) > 1 else ''))