Genie: Hi,Risa,how are you?
Risa:Hi,Genie,i'm fine.How about you?
Genie:I am fine too.May i borrow your book?
Risa:Sure,here it is.
Genie:Thank's a lot.
Risa:Don't mention it!
The question is:
1. What do Genie and Risa say to greet each other?