chat は「雑談」で、一緒に使う動詞は have になります。
例文 Let's have a chat about everyday things, and not use any of the teaching materials or suggested conversation topics.
「マテリアルを使わずに、会話用のトピックリストではなくて、日常の出来事について雑談しましょう。」
参考になれば幸いです。
I would just like to chat
ただただ 雑談/おしゃべり したいです
Let's have a small talk
ちょっと雑談しましょう
I want to talk about random stuff
ランダムに（無計画に）お話ししたいです
＝雑談がしたいです
ご参考までに :)
I would = 私は
just = ただ
like to = したい
chat = 雑談
have a normal conversation = 普通の会話をする
I would just like to chat
「私はただ雑談がしたい」という意味です。
I would just like to have a normal conversation
「（レッソンじゃなくて）普通の会話がしたい」という意味です。
I would like to skip the formal lesson material and have an informal chat to find out more about your country.
I prefer having a casual conversation today if you don't mind.
If you want a relaxed and easy-going talk, let's forget about the lesson material for today.
I would like to skip the formal lesson material and have an informal chat to find out more about your country.
（今日は教材はやめて、あなたの国についておしゃべりしたいです）
I prefer having a casual conversation today if you don't mind.
（もしよければ、今日は一緒におしゃべりをしたいです）
If you want a relaxed and easy-going talk, let's forget about the lesson material for today.
（のんびりおしゃべりしたいなら、今日は教材のことは忘れましょう）
I would like a general chat rather than use specific materials.
"I would just like a general chat".-A general chat means not about any specific subject, just talking about whatever comes to mind, whether it's about the weather or about your hobbies.
"I'd prefer to just chat than to use any specific materials".
"I would just like a general chat".（フリートークがしたいです）
'A general chat' とは、特定のテーマについて話すのではなく、天気や趣味などその時思いついたことを自由に話すことをいいます。
"I'd prefer to just chat than to use any specific materials"（教材などは使わず自由におしゃべりをしたいです）
I do not want to do the material, but would just like to talk.
When you want to express that you just would like to talk in a lesson and not do lesson material; then you may express this in the following ways:
-I would just like to chat
-I would like to have some free conversation
-I do not want to do the material, but would just like to talk.
-I just want to practice speaking. We can just use the class to chat.
教材を勉強するのではなく、「フリートークをしたい」と先生に伝えたいのですね。次のように言えます。
-I would just like to chat（おしゃべりをしたいです）
-I would like to have some free conversation（フリートークをしたいです）
-I do not want to do the material, but would just like to talk.（教材ではなく、会話をしたいです）
-I just want to practice speaking. We can just use the class to chat.（スピーキングの練習をしたいです。今日はおしゃべりをしましょう）
Today I would just like to have a casual chat for my lesson.
If you would like to tell your teacher that you would just like to have a casual chat for your lesson, you can say something like "I would just like to have a casual conversation." or "Today I would just like to have a casual chat for my lesson.".
「今日のレッスンではおしゃべりをしたい」と先生に伝えたいということですね。次のように言えます。
"I would just like to have a casual conversation."（雑談をしたいです）
"Today I would just like to have a casual chat for my lesson."（今日のレッスンではおしゃべりをしたいです）
I feel like just chatting today, not focusing on the lesson topic.
Free talk: means just having a general conversation about any particular subject or many subjects, it could be about "You, where you live?, what you enjoy doing?"
Not focusing on the lesson topic: means that you don't want to give your entire attention to the lesson topic. Today I would rather focus on having a general conversation with you.
Free talk: テーマを決めず自由に話すことをいいます。例えば、「どこに住んでいるの？」とか「趣味は？」とか、そんな会話でもオッケーです。
Not focusing on the lesson topic:「テーマを決めずにレッスンをしたい」という意味です。
Today I would rather focus on having a general conversation with you.（今日は、自由に雑談をしたいです）
When you make a request, it is always very polite to use the phrase "would like." "Informal communication" is an effective way to describe the fact that you just want to chat. I hope that this helps. :)
During an online English lesson, when you want to just chat (like when talking to a friend, not about any certain topic), you want to know what to say when you would like to just chat casually.
I would like to have a free conversation without any specific topic today
Today, if it's alright, I would like to have a very informal chat with you
A free conversation is a conversation that doesn't have any topic. Anything can be discussed in the lesson such as your country, the weather, hobbies, likes, and dislikes.
An informal chat has much the same meaning. When we say informal we mean that it will be very casual, relaxed and friendly
"A free conversation" はテーマのない会話をいいます。自分の国・天気・趣味・好きなこと嫌いなことなど、「何でも話していい」ということ。
"An informal chat" もほぼ同じ意味です。"Informal" は「カジュアルで砕けた会話」を表します。
オーストラリア 
日本 
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イギリス 
アメリカ合衆国 
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