Which Conan episode says, "Are the text messages from the girl I like in it?"

In the 400th episode of "The Doubtful Lan", Conan lied to Xiaolan and said that the reason why he didn't want Xiaolan to look at his phone and why he was nervous about it was because there was a girl he liked on the phone. He didn't want Xiaolan to see the text messages he sent to himself. Note: Xiaolan had seen the text messages on Conan’s phone after unlocking the password before, and the only text messages drawn in them were the doctor’s and Ai’s text messages