I often say to Captians: "well, let's look at this together..." -this phrase I use in real life and recently as an example in an interview.
This friendly approach helps relax the pilot and reminds us both that we are on the same team. It's no longer a conflict, because we are reviewing it together.
So, I would say, "let's look at this together. Your ETA is 2010z and the TAF from 1900 to 2200z is forecasting for xxx. Let's double check the notams. Ok now, let's look at the charts, so your alternate mins for PDX are xxx...ect"
See how this changes the situation?
My $0.02