It’s no fun conversing with someone who appears to be distracted. It’s also not enjoyable talking to someone looking down on you for not speaking the way they want you to. When this guy decided to text a lady he was interested in, it didn’t go well.
It appeared that the lady was not as talkative as they had anticipated. For example, she could have been preoccupied with her job or just a person of few words. It’s also conceivable that she didn’t care much about it. In any case, they opted to respond with an amusing putdown to this problem.