A. You sent one message and got no reply
What matters now: What matters now: The message is out and the silence is not a task. You do not have to manage their response. The next decision is whether you watch the phone or put it down.
What not to do next: What not to do next: Do not send a second message to check if they saw it. No reply is information about their side, not a prompt for more contact from you.
Is further contact necessary?: No. Nothing about a missing reply requires another message. Waiting is the step.
