[He smiles at her words, but then there's that sudden stop and long bout of silence and you really don't have to be a genius profiler to know what's going on here. He tenses some, listening intently to the silence and easily takes note of the implied later in her message.
Okay. So much for those 15 minutes, but at least he knows he's not crazy. Maybe. Nothing much to do but to wait, and so he slides his phone back into his pocket. Returns to his desk, though he has no idea how he's even going to pretend to do actual work with that conversation still buzzing in his head.]