A message has been unanswered since yesterday. You know that the reply is late. You do not yet know why. The person could be busy, unsure of the answer, avoiding the subject or simply have missed the notification.
It is tempting to turn that gap into a conclusion about the relationship. Before doing so, separate the practical problem from the interpretation. Do you need a decision by a deadline? Are you asking for reassurance? Has an agreed communication pattern changed repeatedly? Each situation calls for a different conversation.
For a practical deadline, try: ‘I need to confirm the table tomorrow. Would you like me to include you? If I don’t hear back, I’ll book for the others.’ This explains the next step without claiming to know the reason for the silence.
If the issue is a repeated pattern, discuss the pattern directly: ‘We’ve missed a few plans because I didn’t know whether you were coming. What would make confirming easier?’
Allowing several possible explanations does not mean ignoring your own needs. It means choosing an action that fits the information you actually have. A useful follow-up makes the decision clearer and leaves the other person room to explain.