"Hello, how are you? I was wondering if it would be possible to schedule a tour of the winery today?" This is perfectly fine and valid, and in fact is usually

"Hello, how are you? I was wondering if it would be possible to schedule a tour of the winery today?" This is perfectly fine and valid, and in fact is usually the format of my messages to others. It's entirely different from: "Hello, how are you?" ... ... ... "I'm fine; what's up?" "Oh, I was wondering if it would be possible to schedule a tour of the winery today?"