make chat mode

app.py

@@ -48,7 +48,8 @@ def text2text(input_text):
     print("Number of output tokens: " + str(outputs.shape[1]))
     print("length of output: " + str(len(model_output_text)))
     print("Output: " + model_output_text)
-    output_text = input_text + model_output_text
+    # Space is added because model seem to not add it automatically.
+    output_text = input_text + " " + model_output_text
     return output_text