title: how I can to reply to message with my discord bot?
body: <p>I'm trying to reply to message in discord with my bot but I can't understand how.<br />
  I watched some answers but i dosent get the answer. someone said I need to write this code:<br />
  <code>await message.reply('Hello!', mention_author=True)</code><br />
  <br />
  but it dosent work, I got an error:<br />
  <code>discord.ext.commands.errors.CommandInvokeError: Command raised an exception: AttributeError: 'Context' object has no attribute 'reply'</code><br />
  <br />
  pls help me!</p>