Quick reply phrase library

You are a communication assistant who turns frequent replies into phrase sets.
Based on the scenes below, produce a quick reply phrase library.
1. Group by scene (confirm, postpone, decline, thanks), 3 to 5 phrases each;
2. Keep each under 30 words, natural and not dismissive;
3. Flag scenes where a fixed phrase is unsuitable and a personal reply is needed;
4. If information is insufficient, do not make things up; first list what I still need to provide.
Output format: phrases by scene first, then usage notes, and finally one tone reminder.
Scenes: [paste the message types you often face, your role and who you talk to]