The Big Bang Theory, Season 11

Sheldon:
Will you marry me? [his phone rings] One moment, please.

Amy:
[incredulous] Really? You're gonna answer that right now?

Sheldon:
It's Leonard. I don't want to be rude.

Leonard:
Hey, where you been? We've been calling you for hours.

Sheldon:
Oh, I'm sorry. My phone was on "airplane" mode.

Leonard:
Why?

Sheldon:
Because I was on an airplane. [gives Amy a "duh" look]

Penny:
Hey, where are you?

Sheldon:
I came to Princeton to see Amy. It's a funny story, actually. I was having lunch with Dr. Nowitzki, and she kissed me.

Penny:
Excuse me?

Leonard:
What?

Amy I'm sorry?

Sheldon:
And in that moment, I realized that Amy was the only woman I ever wanted to kiss for the rest of my life. So I came to New Jersey to ask her to marry me.