Alexa to Raspberry/Holo and back


Hello, I am a new Hologram user. I am prototyping a Alexa trigger to a raspberry with nova. I am curious what would be the best software choice for this connection. I see 3 messaging options. Basic HTTP, WebHook, and SpaceBridge. Can someone tell me the pros and cons of each option? I did a quick test of posting a message to the service, it replied back successful, but my raspberry was turned off at the time. In the console log, I saw a separate message indicating the service could not contact my raspberry (true), but this was “out of band”. I would want that error message to be returned in the original response to the post (back to alexa so she can tell the user what really happened). Is this possible?