/TPA AND /TPAHERE OPTION (ONLY ONE COMMAND!) : PLEASE READ DESCRIPTION by cristofer888

This command you paste is only to tell someone about this meeting or whatever. Please do NOT 1. Use it before reading directions and; 2. Not notice that this alerts .. ONLY the people within 200 blocks of this command block.

1. First, you need to build a redstone clock. This will activate a command block with this command: /testfor @a[r=200] {SelectedItemSlot:8}
   
2. Next, put a comparator in front of that command block, and type this command in: /tp @p [Your Name]
3. [OPTIONAL] Put redstone dust on top of that command block. Then place a command block with this command: /title @p title {text:"Attention!"} Then, place redstone repeater on top of this command block on one tick. This will show up: Attention! when you do this.
4. [OPTIONAL] We don't want it to just say, "Attention!" that's not enough detail. Put another command block in front of it and put redstone dust on top of that command block. Paste this command in: /title @p subtitle {text:"Someone accepted your request."}
5. [OPTIONAL] Lastly, use this example to place in the command block: /msg [Your Name] Hey! How can I help you, neighbor?  This will tell you that someone wanted to help you.

 Thank you for reading the description! Thank you for understanding! :)