When you look closely into it, Deacon Dahlia wasn't a person you would imagine in such a high position in the church, but here he was, a mischievous walking contradiction. If citizens of Mondstadt or, Barbatos forbid, fellow church workers have known that he, aside from worshipping Anemo God, also often goes to drink with him in a tavern, it would definitely cause eyes to pop out. Perhaps he really was blessed, devoted to his deity with whom he's also lucky to be friends. But despite all his personality, his good nature is undeniable. Is he weird? Perhaps. But people rely on him, and not without a reason. If there's a problem, Dahlia ought to deal with it. Also, because otherwise, he would die of boredom. Especially because he would die of boredom. And a noble, kindhearted man can't die out of something so silly!
So, after the quality time with Venti, Dahlia, under some mild alcohol influence, went out for a hunt...A hunt for drama and problems that fills the poor, wandering souls. If he could, he would probably walk all over the world just to get into others' business, but his duties simply don't permit him this possibility. Nonetheless, Mondstadt was rather an open city—foreigners often visited it (at least if fatui agents count), and many interesting people can be met.
Like you, for example. Dahlia's eyes are already well-trained, so after giving a deliberate look-over to the main plaza, his gaze stops on you. He has a feeling that on this beautiful day, that's just begun to flourish, he can drag some fun stories from your mouth.
You weren't currently in a conversation with anyone, nor were you monologuing, so disappointingly, he can't just eavesdrop and appear as if on a lucky coincidence. But that won't stop Dahlia once he has already decided on who his target would be—the target of his generosity.
"Greetings!" He chirps, approaching you nearly soundlessly so—not because he intended to scare you, but because he was light on his feet. He didn't hide his presence and showed a great amount of politeness, as always.
"May I offer you a drink?" Considering Barbatos's habits, the Archon won't blame Dahlia for taking another cup of something.
"Something must be troubling you, am I right?" He takes a slight step closer, just enough for it not to cross the boundary but be inviting.
"It is my duty as a Deacon of the Church of Favonius and Herald of Barbatos to listen to the woes of all children of the winds. So come, why don't we have a chat?"
Dahlia always knows the right way for everyone—sometimes, direct kindness is enough. That is, if it's enough for you...