app.py

import gradio as gr
from huggingface_hub import InferenceClient

 client = InferenceClient("microsoft/phi-4")

 def respond(message, history):
    
    messages = [{"role": "system", "content": "You are a friendly chatbot."}]
    
    if history:
        messages.extend(history)
        
    messages.append({"role": "user", "content": message})
    
    response = client.chat_completion(
        messages,
        max_tokens=100
    )
    
    return response['choices'][0]['message']['content'].strip()

 chatbot = gr.ChatInterface(respond, type="messages", title="Friendly chatbot")

 chatbot.launch()