Try this
- Choose a plain phrase that does not rely on subtle hints, and discuss what happens when it is used.
- If resuming is wanted, arrange the next contact separately. A pause should not trigger a stream of follow-up messages elsewhere.
A worked example
“When I say I need to stop, I mean this conversation needs a break.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Do not continue the same discussion through another channel immediately afterward.