The Differences Between Friendly and Serious Tone

When people want to be extra polite and extra friendly they tend to raise their pitch a little bit. If you go in somewhere and you say in sort of a cold tone could you tell me if you have ravioli that's going to put the person on edge versus a big smile. Such a difference in how warm your tone is. Also I'm thinking about how all of these are different if you say them with a smile versus a serious tone.