This document provides examples of formal and informal phrases for thanking people and responding to thanks. For expressing thanks more formally, it suggests saying things like "I'm very grateful for..." or "Thank you very much for...". For responding formally, common responses include "You're welcome" and "It was my pleasure.". Less formally, people may say "Thanks a million" or use responses like "Don't worry about it.". The document also includes examples for thanking someone for an unsuccessful attempt, both formally and less formally.