Update app.py

app.py

@@ -42,7 +42,7 @@ def choose_model(model_name):
     elif model_name == "Microsoft-phi-2":
         model = "microsoft/phi-2"
 
-    elif model_name == "Zephr-7b-beta":
+    else:    # default to zephyr if no model chosen
         model = "HuggingFaceH4/zephyr-7b-beta"
     
     return model