Hello,Alex!可以这样表达“经理我想和你聊/讨论一下？”

我想和你的经理/你谈一谈。 and more politely way is as :“能和你们的经理谈谈吗？/能和你一起谈谈吗？”

I can practice Chinese with you,Email me by [email protected].

Hello, Alex This is William, you skype friend I would like to speak to the manager/to you 我想跟经理/你 谈谈。 Speak to means " 对 xxx 讲话/谈话/说话“。 Also how do you say the more informal word "chat" Chat informal expression is 聊天，闲谈，闲聊。 Please note even they are informal expressions, they are not dialects. So everybody in China can understand it.

If it is a informal occasion，you can say”谈谈“、”聊一下“、”聊会天“、”唠嗑“、”侃“and so on