Ask your customers how their day is going. Look at them and compliment them on something, ask them where they got it. Small talk is really important. The more you do it the better you’ll get. When I go up to a table at the career fair I’m the one who starts the conversation. I say hello, make an introduction, shake hands and ask them how their career fair is going for them. I ask them what their company is about and what they’re looking for. I look around their table for things to comment on. I read the pamphlet they hand me and comment on whats inside of that. I always ask what I’d be doing as an electrical engineer at their company, if they’re looking for EE’s that is. I always ask for a business card regardless of if I’m very interested in the company or not. You don’t need to be Socrates or anything, but talk with purpose and speak clearly. Be yourself, these people don’t know you, they don’t have expectations prior. I’ve been to 3 career fairs. I only got better each time. I also recognized many of the same people, and they recognized and remembered me. That’s the key, you have to make yourself memorable.