She lost her bus card and was in a bad mood. How to comfort her!

In fact, what a girl wants is a boy who can always stay with her when she is in a bad mood, chat with her, tell her jokes and take her shopping for dinner. What matters is not how to comfort her, but how to show her your efforts to make her happy. So I think you'd better watch a movie and chat with her to divert your attention. When you want to send her back, seriously, you are happier now. Maybe she will also say that she is sad and complain to her best friend that she lost her card, but she will definitely say that she feels much better and show off how good you are to her.