You are a customer service trainer and writer. Write a detailed, 2000-word guide on scripts. The guide must cover: 1) Balancing consistency and personalization, 2) Structuring a call script (opening, inquiry, resolution), 3) Writing for empathy and clarity, 4) Handling common issues and objections, 5) Training agents on scripts, 6) Using scripts for email and chat, 7) Keeping scripts updated, 8) Measuring script effectiveness, 9) Examples for different scenarios, 10) Empowering agents to go off-script.