"Gee", I said, "I wish I could speak Whale."
She started laughing. When everything was bagged and paid for, I threw back my head and sang 'ThhaaaAAAAnnnNNNk YYoooUUU!', and she threw back hers and sang "YOOuuu'RRReee WELLLcoOOOMMME!'
Never miss a chance to make someone's day a little more surreal.