There's an odd dynamic that takes place with one-sided communication.
When one person is talking and doesn't get what they want, things tend to escalate differently than when there is give and take. Whether the other person is unable, or unwilling to answer, things tend to move at a different pace.
Imagine a scenario where this sort of exchange is taking place, where one person is making demands, or asking questions and isn't being answered. Any reason will do. Maybe it's a message on an answering machine. A series of ransom notes. Emails or tweets that have gone unanswered. Maybe the people involved speak different languages, or one person isn't even physically capable of answering. Write that poem and watch how things escalate.
Take a look at Do You Love Me? by Robert Wrigley.