how are you? I am a member now:)"
"I'm good. Good for you."
"Okay. Welcome to membership."
"Fine. Want to go for a jogg?" (Spelling taken from his profile. I figure it would be best to speak his language.)
"I'm doing well. Good for you. Way to fill out a profile. I'm proud of you!"
"Great. Finally! Thank God. Do you want to get married now?"
I think all those responses are appropriate.