Hi - I would advise that you be genuine, show enthusiasm when listening to their story and be enthusiastic when telling yours. Look for ways you can add value or help them. Don't be afraid to ask them for specific help - though be mindful this is your first meeting, so anything you ask should be relative to the small amount of trust and respect you can build in one meeting. Make sure you follow up, relationships aren't built in a single meeting. Finally, try to relax and don't put too much pressure on it. A meeting like this should not be a binary one, where you could 'win' or 'lose' something, it is an exploration to see if you have common interests and may like working together in the future, either as co-founders or simply friends and acquaintances. If it's not to be, don't worry or compromise yourself to try and be liked, as this won't help you in the long-term and the business relationship won't last anyway. Better to find out quickly and move onto the next meeting, where you might genuinely click with that person and have a great business relationship. Hope that helps at all!