In spoken discourse, we can usually predict when our conversational partner is about to finish a turn by listening to their intonation. This is not always successful, however, as demonstrated by the following clip in which a TV host assumes that the reporter has finished his lines when in fact he has more to say.
Political commentators and journalists all have their own idiosyncratic styles when interviewing politicians. Emily Maitlis, the BBC Newsnight commentator, often shows exasperation and incredulity in her voice through sweeping intonation falls and facial expressions. Here is a brief analysis to show how she uses linguistic features to signal this attitude.