add play agin button

app.py

@@ -140,6 +140,9 @@ def ask_if_helped():
   if y:
     write_bot("I am happy to help!")
     st.session_state.is_helpful['ask'] = False
+    again = st.button('Play again')
+    if again:
+      write_bot("Please describe your word!")
   elif n:
     st.session_state.actions.append('cue')
     st.session_state.is_helpful['ask'] = False