Oops

Rofl, I worked in a center with a girl at the desk next to me that I could get to say that as she was ending a call with a customer. All I had to say was "I love you bye" and she would repeat it!

....and then you suddenly remember that your boss is a girl

I did that one time as I hung up. My boss called back immediately and when I answered the phone he said, "I love you too, Bob." Unfortunately, it was on speaker phone ...