SPOILERS BELOW
Hi hi! I’m assuming you mean the opening scene in the car? Try inputting TALK DAD to start a conversation with him. As a general rule, when people and items are written in capital letters, it’s a hint that you can interact with those objects—just remember that the game takes VERB-NOUN commands only (there's more about that if you type in 'help').
If that’s not what you were talking about, feel free to reply again :D