How to get chat id using conversation id ?

Question

I'm developing a Teams bot app and need to retrieve chat history (including chat tab). I'm planning to use the Graph API endpoint /chats/{chat-id}/messages.

However, I need to know how to obtain the chat-id for this request. How can I get the chat-id?"

public async Task OnMessageActivityAsync(ITurnContext turnContext, AppState turnState, CancellationToken cancellationToken)
 {
        var conversationReference = turnContext.Activity.GetConversationReference();
       var chatId ??? //conversationReference.id  
}