No idea if it is strictly correct or not - but when calling Scottish Info I would usually pass type, dep a/d, arr a/d, location, routing and altitude. I wouldn't give estimate to next point unless they ask.
I think the main thing is that a FIS is an informal/friendly service - they fully expect all levels of experience calling them. I sat with them one afternoon a few weeks ago and realised just how informal and helpful they are - they really provide a top service and do a fab job!