app.py

import gradio as gr

def echo(message, history):
    return message

about_text = """
## About this bot  
This demo **simply echoes** everything you type.  
Use the chat box on the right to try it out!
"""

with gr.Blocks() as demo:
    with gr.Row():
        with gr.Column(scale=1):
            gr.Markdown(about_text)

        with gr.Column(scale=2):
            gr.ChatInterface(echo)

demo.launch()