```js async function run(model, prompt) { const messages = [ { role: 'system', content: 'You are a friendly assistant' }, { role: 'user', content: prompt } ]; const response = await fetch( `https://api.cloudflare.com/client/v4/accounts/{ACCOUNT_ID}/ai/run/${model}`, { headers: { Authorization: "Bearer {API_TOKEN}" }, method: "POST", body: JSON.stringify({ messages }), } ); const result = await response.json(); return result; } run('@cf/meta/llama-2-7b-chat-int8', 'Tell me a story').then((response) => { console.log(JSON.stringify(response)); }); ``` can we make it remember our chat history? i tried appending user in messages but did not work