The context of the following conversation is Tracy wanted to become an astronaut since she was a kid. She studied hard and her dream came true.:
Tracy says My mom has always said dream big and maybe your dreams will come true one day.  Today is the day..
The friend responds What's your dream come true?.
Tracy responds I got hired at the top aerospace research lab. I  am going to become an astronaut..
The friend responds Will you be training to go to space?.
Tracy responds That's been my dream since I watched the rocket launch on TV..
The friend responds Just a child sitting in her living room, and now you are here..