The conditional tense is used to say what would happen if something else were to occur or to talk about intentions to do something.
If I was was rich, I would buy a big house.
Si j'etais riche, je acheterais une grande maison.
I would like to talk with a 15 year old young person.
J'aimerais correspondre avec des jeunes de 15 ans.
I would like to go to the cinema
Je voudrais aller au cinema.