In the car

Cassie: "Dad?"
Me: "Yes?"
Cassie: "Dad?"
Me: "Yes?"
Cassie: "Dad?"
Me: "Yes?"
Cassie: "Dad?"
Me: "Yes?"
Cassie: "Dad?"
Me: "Yes?"
...
This continues until Nicole reaches over and removes Cassie's headphones, at which point she can hear me.