Try this
- Identify the direct questions and separate them from background or feelings the sender chose to share.
- Answer what you can honestly answer. If a larger discussion is needed, say what you would prefer to handle in conversation.
A worked example
“I can answer the booking question now: Saturday works. I would rather talk about the wider planning issue tomorrow.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
A short reply should not pretend to settle points you have not addressed. State clearly what remains open without promising a response you cannot give.