title: How to set a Slack reminder only to notify a subset of the people in the channel
body: <p>I need to set up a reminder in a channel, but this reminder should not send a notification to all the people in the channel but only to a particular subset.
  <br>
  I tried what shown below.</p>
  
  <pre><code>/reminder @user1 @user2 @user3 A message every 30 days 
  </code></pre>
  
  <p>But when I verify it, slack add " after the first user, which tells me that the reminder would be sent only to the first user and not the others.</p>
  
  <pre><code>I will remind @user1 “@user2 @user3 A message” at 9AM Monday, April 1st.
  </code></pre>
  
  <p>Will slack send the notification only to user1 or to all them? (As mentioned). <br>
  Does Slack have the feature to send reminders to multiple users without disturbing the whole channel?
  <br> We don't want to create a separate channel.</p>