My dad is a Dr. and he literally told me "Good luck, and a nice day."

This was a while ago when I was around 12 years old. He was busy talking to some patients and I came up to him and I just told him that I was going to get something to eat. I don't know why, but I'm just feeling extraterrestrial sometimes. But he just looked at me with empty eyes and told me "Good luck, and a nice day." In hindsight, I wished he told me what exactly the Dr. is good for and gave me an appointment.