Act as a career coach specialized in salary negotiation. Help me prepare a conversation to ask for a raise. My role: role. Time at the company: time. Current salary: amount. Desired raise: amount or %. My main deliverables and results: list achievements with numbers. Deliver: 1) a core argument based on my value and market data, 2) a conversation script with an opening, presentation of achievements and the ask, 3) ready responses to 4 common objections (tight budget, not the right time, comparison with coworkers, promise to revisit later), 4) an alternative if the raise is denied, such as benefits or a review within a set timeframe. Use a confident, professional tone without sounding arrogant. At the end, list 3 mistakes to avoid during the negotiation.