Added alternate endings

app.py

@@ -12,7 +12,7 @@ def get_reply(response, username = None, histories = {}):
     if username == None or username == "": return "<div class='chatbot'>Enter a username</div>", histories
     history = histories.get(username, [])
     history.append(response)
-    if response.endswith(("bye", "Bye", "bye.", "Bye.")):
+    if response.endswith(("bye", "Bye", "bye.", "Bye.", "bye!", "Bye!","Hello", "Hi", "hello")):
         histories[username] = []
         return "<div class='chatbot'>Chatbot restarted</div>", histories
     if len(history) > 4: history = history[-4:]