Read the following dialogue! Then answer the question!

Linda: Wow, that's a cool speech! You're great!

Eric: Thanks.

Ryan: All the audience like your speech. Congratulations! By the way, I like your haircut. Did you just cut your hair?

Eric: Thanks. I cut my hair yesterday.

Linda: You look more handsome. We were surprised when we saw you coming up on the stage with new appearance.

Eric: Thank you. I did my best. I hope the audience and especially our teachers like my speech.

Ryan: Don't worry about that! Your speech content inspires and motivates us. I think you did it in your first speech.

Eric: Thanks for your all support.

Why do Ryan and Linda congratulate Eric?