Nothing. Elias was getting nothing from Zacharias; no hint that any of the subjects he was offering were of interest to the other man. He wasn't used to forced conversation, being generally quite happy to talk about whatever was of interest to his colleagues or the strangers he was chatting to in bars. Elias just wanted Zacharias to feel comfortable, but he had a feeling that the other man wouldn't really appreciate him saying it. He was learning, slowly, that other people didn't necessarily like being babied, and he worried that Zacharias might interpret his flexibility in a bad way. He would just have to learn to be more subtle about it.
When Zacharias changed the topic, Elias obliged, changing tracks quickly. If Zacharias didn't want to talk about Hogwarts or the Ministry, then they wouldn't. Besides, he was always more than happy to talk about his home, of which he was extremely proud and loved dearly. "I was born in Hannover, in Germany," he told him pleasantly. "Pretty dreadful weather there, too," he added with a smile.
His instict was to ask if Smith had been there before, but he had not answered his question about travel, so Elias assumed that was off the table, too. "But I went to Durmstrang, so I've been spending time abroad since I was a school kid. I have always enjoyed meeting people from around the world, and learning about the differences between the magical communities." Elias lifted his coffee and took a sip, giving Zacharias the chance to say something if he'd like.
Unsurprisingly, his companion still seemed a bit lost as to where he should take the conversation, so Elias kept going. "Of course, the one thing that seems to be common no matter where I go is Quidditch. It's popular everywhere I've been, which is nice. It means there's always something to talk about if you meet someone from somewhere particularly distant. Do you play at all? Or do you have a team?" Bringing up Quidditch was close to his last hope, at least when it came to the typical conversation-starters. If Zacharias wasn't into the sport, they might be forced to chat about the office. Elias wasn't entirely opposed, but he had a feeling that Zacharias wouldn't be thrilled.