Lisa followed his gaze and watched the man for a moment. He was sitting quietly reading, seemingly oblivious to the time of day or anything around him. Surely he would be able to hear them speaking, even if it was mumbled. Lisa wrinkled her nose a little bit, sizing up the man for a moment before turning back to Ken.
"Well, I'm sure that his wife left him and took the dog with her," she deduced. "That's why he's here. He needed to escape into another world so that he won't think about the one he lives in for just a moment. It's why he's reading Dickens, of course." She smiled at him, proud of the tragic backstory she'd made up on the spot.
"Thank you," she told him. "I hope he leaves so you can go home soon."