title: Discord.py: wait_for('reaction_add') not working as intended
body: <p>I'm trying to make an FAQ bot on discord.py and it was going good so far. I wanted to add an extra feature where when a FAQ is detected by the bot, instead of directly sending the answer, the bot sends a prompt message with two reactions -- thumbs-up and thumbs-down -- and depending on the reaction selected by the user, the bot either sends the answer or deletes the prompt message.</p>
  <p>Now when an FAQ is asked, the bot detects it and sends the prompt asking if the user wants the answer and even reacts to it. The problem is, the prompt message gets deleted as soon as the bot finishes reacting with the Thumbs-down emoji. I want it to wait for the user to react and proceed accordingly.</p>
  <p>What am I doing wrong? Please help. Thanks in advance!</p>
  <pre><code>@bot.event
  async def on_message(message):
      await bot.process_commands(message)
      
      if (message.author.bot):
          return        
  
      if(isQuestion(message.content)):
          (answer_text, question_text) = answer_question(message.content)
  
          if answer_text:
              botmessage = await message.channel.send(f&quot;&quot;&quot;Do you want the answer to: {question_text} ?&quot;&quot;&quot;)
              
              await botmessage.add_reaction('\N{THUMBS UP SIGN}')
              await botmessage.add_reaction('\N{THUMBS DOWN SIGN}')
  
              def checkUp(reaction, user):
                  return user == message.author and str(reaction.emoji) == '\N{THUMBS UP SIGN}' or str(reaction.emoji) == '\N{THUMBS DOWN SIGN}'
  
              try:
                  reaction, user = await bot.wait_for('reaction_add', timeout=60.0, check=checkUp)
              except asyncio.TimeoutError:
                  await botmessage.delete()
              else:
                  print(reaction.emoji)
                  if reaction.emoji == '\N{THUMBS UP SIGN}':
                      await botmessage.delete()
                      await message.channel.send(answer_text)
  
                  elif reaction.emoji == '\N{THUMBS DOWN SIGN}':
                      await botmessage.delete()
  
  </code></pre>