Be curious. Ask questions about hobbies, values, theology, family, friends, job, dreams, skills, etc. Listen to the answers. REALLY listen. Don’t just prepare your next response while they’re talking, without taking in what they’re sharing.
Treat them like an interesting child of God who is worth getting to know, even if it doesn’t work out. They’re not at a job interview- & neither are you. Don’t check out if you realize it’s not going to work out. End well- if you walk away with their respect, they might later think to introduce you to a friend. 😉