First, to say "Hi, my name is Laurence.", we say "Salut, je m'appelle Laurence." But replace my name by yours!! 5555 And to say "How are you", there are two ways, a polite one and the informal one. The most polite one is "Comment allez-vous?" and the informal one is "Comment vas-tu?
But it's hard to teach without hearing each other. We have different tones than in English and Thai. We should do a voice call, I would be easier but I'm shy...