dialog bahasa inggris tentang attention+ giving compliment+ cheking for understanding+ asking opinion

1. A: Hello everybody, can I have your attention please? 
    B: Sure, whatsup buddy? 
2. A: Is it your new dress which you bought it yesterday? 
    B: Yes it is. 
     A: It is very beautifull. I like it. 
    B: Thank you
3. A: So, do you understand about this math resolve? 
    B: Oh yes. i understand now. Thank you 
4. A: I wanna buy some souvenir for my friend, in your opinion which one is best for them? The red one or the blue one?