It can take several hours to get a response but in my experience once you do - in other words you've got someone's attention - responses can be quite quick ie. almost like a regular chat session. Best thing is the Twitter team are very competent - to the point that I am convinced they are part of the Hobart teamThanks for the tip - I hadn't thought of Twitter because I don't really use it. I tried FB messenger but wasn't getting a response after the request for my booking ref