In French, if someone asks
How are you? by saying
Comment allez-vous
you can answer
Very good, thanks. by saying
Très bien, merci.
The way you say it, sounds like
Tray bee-en, mare-see.
It's also polite to ask how they are, so you can add
et vous? to the end of that sentence.
That sounds like
Ay voo? (The vowel in Ay sounds like Hay)
So using all the words we've learned:
Bonjour, Au revoir,
Monsieur, Madamoiselle,
Comment allez-vous and
très bien merci, et vous
We can have a conversation in French like this:
Girl: Bonjour Monsieur.
Boy: Bonjour Madameoiselle, comment allez-vous?
Girl: Très bien merci, et vous?
Boy: Très bien, merci.
Girl: Au revoir!
Boy: Au revoir!