changed random yes/no chatbot into general chatbot

turned that chatbot of random choices into more dynamic conversation, added token to access model.

app.py

@@ -1,12 +1,25 @@
 import gradio as gr
-import random
+from huggingface_hub import InferenceClient
 
-def respond_yes_no_randomly(message,history): #function to return the history of messages sent
-    responses = ["Yes", "No"]
-    return random.choice(responses)
+client = InferenceClient("microsoft/phi-4")
 
+def respond(message,history): #function to return the history of messages sent
+    messages[{"role": "system", "content": "You are a friendly chatbot!"}]
 
-chatbot = gr.ChatInterface(respond_yes_no_randomly, type="messages", title = "Yes/No Bot") 
+    if history:
+        messages.extend(history)
+
+    messages.append({"role": "user", "content":message})
+
+    
+    responses = client.chat_completion(
+        messages,
+        max_token = 568
+    )
+    return response['choices'][0]['message']['content'].strip()
+
+
+chatbot = gr.ChatInterface(respond, type="messages", title = "Friendly chatbot") 
 # chatbot UI - conversation history and user input
 
 chatbot.launch()