Build a chat with history

const messages = [
  { role: 'system', content: 'You are a helpful assistant for a bakery in Pune. Keep answers short.' },
]

async function send(text) {
  messages.push({ role: 'user', content: text })
  const reply = await charge.ai.chat(messages)
  messages.push({ role: 'assistant', content: reply.text })
  return reply.text
}