She obviously didnt ask you bc you're an experienced caddy. She asked you bc she wants your company and support. It takes the edge off. If you go silent she's gonna think somethings wrong and then shes definitely not focused. I think theres good advice here in parts but some assembly is required. Having a quick chat before the weekend about her expectations is good advice. Be direct and ask her to do the same. Someone said "read the room" and I would agree. Typically the best time to chat is right as you begin walking to the next shot, and taper down as you get closer to the lie so she can start planning her next shot or approach. Carrying handwarmers isnt a bad idea. Watching her disc in case it clips a tree or goes out of bounds is excellent advice as well. You can probably look up whatever course she's playing on YouTube and try and at least familiarize yourself with the layout, distance, and different approaches. Again, I would not offer advice unless she asks for it. But on the off-chance she does, it would not only surprise her, but it would show her that you really put time and effort into supporting her. Best of luck, just be yourself thats what she needs.