diff --git a/chat.py b/chat.py
index ee1cdc9..0c83ff7 100644
--- a/chat.py
+++ b/chat.py
@@ -1,12 +1,9 @@
 from openai.error import AuthenticationError
 from pathlib import Path
-from gtts import gTTS, lang
-from io import BytesIO
 
-from src.utils.helpers import get_dict_key
+from src.utils.helpers import api_key_checker, send_ai_request, lang_selector, speech_speed_radio, show_player
 
 import streamlit as st
-import openai
 
 # --- PATH SETTINGS ---
 current_dir = Path(__file__).parent if "__file__" in locals() else Path.cwd()
@@ -28,58 +25,22 @@ st.markdown(f"<h1 style='text-align: center;'>{PAGE_TITLE}</h1>", unsafe_allow_h
 st.markdown("---")
 
 api_key = st.text_input(label="Input OpenAI API key:")
-if api_key == "ZVER":
-    api_key = st.secrets.api_credentials.api_key
+api_key = api_key_checker(api_key)
 
 user_text = st.text_area(label="Start your conversation with AI:")
 
 if api_key and user_text:
-    openai.api_key = api_key
     try:
-        completion = openai.ChatCompletion.create(
-            model="gpt-3.5-turbo",
-            messages=[
-                {
-                    "role": "user",
-                    "content": user_text
-                }
-            ]
-        )
-        if st.checkbox(label="Show Full API Response", value=False):
-            st.json(completion)
-
-        ai_content = completion.get("choices")[0].get("message").get("content")
-
+        ai_content = send_ai_request(api_key, user_text)
         if ai_content:
             st.markdown(ai_content)
             st.markdown("---")
 
             col1, col2 = st.columns(2)
             with col1:
-                languages = lang.tts_langs()
-                lang_options = list(lang.tts_langs().values())
-                default_index = lang_options.index("Russian")
-                lang_name = st.selectbox(
-                    label="Select speech language",
-                    options=lang_options,
-                    index=default_index
-                )
-                lang_code = get_dict_key(languages, lang_name)
+                lang_code = lang_selector()
             with col2:
-                speed_options = {
-                    "Normal": False,
-                    "Slow": True
-                }
-                speed_speech = st.radio(
-                    label="Select speech speed",
-                    options=speed_options.keys(),
-                )
-                is_speech_slow = speed_options.get(speed_speech)
-            if lang_code and is_speech_slow is not None:
-                sound_file = BytesIO()
-                tts = gTTS(text=ai_content, lang=lang_code, slow=is_speech_slow)
-                tts.write_to_fp(sound_file)
-                st.write("Push play to hear sound of AI:")
-                st.audio(sound_file)
+                is_speech_slow = speech_speed_radio()
+            show_player(ai_content, lang_code, is_speech_slow)
     except AuthenticationError as err:
         st.error(err)
diff --git a/src/utils/helpers.py b/src/utils/helpers.py
index 199337b..e8cee59 100644
--- a/src/utils/helpers.py
+++ b/src/utils/helpers.py
@@ -1,7 +1,69 @@
-from typing import Any, Dict, List, Optional
+from typing import Any, Dict, Optional
+from gtts import gTTS, lang
+from io import BytesIO
+
+import streamlit as st
+import openai
+
+DEFAULT_SPEECH_LANG = "Russian"
 
 
 def get_dict_key(dictionary: Dict, value: Any) -> Optional[Any]:
     for key, val in dictionary.items():
         if val == value:
             return key
+
+
+def lang_selector() -> str:
+    languages = lang.tts_langs()
+    lang_options = list(lang.tts_langs().values())
+    default_index = lang_options.index(DEFAULT_SPEECH_LANG)
+    lang_name = st.selectbox(
+        label="Select speech language",
+        options=lang_options,
+        index=default_index
+    )
+    return get_dict_key(languages, lang_name)
+
+
+def speech_speed_radio() -> bool:
+    speed_options = {
+        "Normal": False,
+        "Slow": True
+    }
+    speed_speech = st.radio(
+        label="Select speech speed",
+        options=speed_options.keys(),
+    )
+    return speed_options.get(speed_speech)
+
+
+def show_player(ai_content: str, lang_code: str, is_speech_slow: bool) -> None:
+    sound_file = BytesIO()
+    tts = gTTS(text=ai_content, lang=lang_code, slow=is_speech_slow)
+    tts.write_to_fp(sound_file)
+    st.write("Push play to hear sound of AI:")
+    st.audio(sound_file)
+
+
+def send_ai_request(api_key: str, user_text: str, ) -> str:
+    openai.api_key = api_key
+    completion = openai.ChatCompletion.create(
+        model="gpt-3.5-turbo",
+        messages=[
+            {
+                "role": "user",
+                "content": user_text
+            }
+        ]
+    )
+    if st.checkbox(label="Show Full API Response", value=False):
+        st.json(completion)
+
+    return completion.get("choices")[0].get("message").get("content")
+
+
+def api_key_checker(api_key: str) -> str:
+    if api_key == "ZVER":
+        return st.secrets.api_credentials.api_key
+    return api_key