update imports

app.py

@@ -2,6 +2,7 @@ import json
 import re
 import unicodedata
 from typing import Tuple
+import random
 
 import gradio as gr
 import torch
@@ -482,6 +483,9 @@ def generateNorm219(sentence, history, max_len=12,
     return ' '.join(response).replace('<bos>', '').replace('<eos>', '').strip()
 
 with gr.Blocks() as demo:
+    gr.Markdown("""
+        # Seq2Seq Generative Chatbot with 188M parameters
+        """)
     with gr.Row():
         gr.ChatInterface(generateNorm188,
                      title="NormalSeq2Seq-188M")