gistfile1.json

/sayraw {"text":"Want to reset the current minigame? ", "extra": [{"text":"Click here!", "clickEvent":{"action":"run_command", "value":"/scoreboard players set minigame_resetting 1"}}]}


{
  "text": "Want to reset the current minigame? ",
  "extra": [
    {
      "text": "Click here!",
      "clickEvent": {
        "action": "run_command",
        "value": "/scoreboard players set minigame_resetting 1"
      }
    }
  ]
}

Make it recursive please. It would be possible to make dialog systems.

/tellraw @p {
  "text": "- I need teleportation service",
  "clickEvent": {
  "action": "run_command",
  "value": "
    /tellraw @p
    {'text':'Choose your destination: ', 
    'extra':[
      {'text':'Jungle ', 'clickEvent':{'action':'run_command', 'value':'/tp @p 0 70 0'}}, 
      {'text':'Desert ', 'clickEvent':{'action':'run_command', 'value':'/tp @p 10 70 10'}}
      {'text':'Village ', 'clickEvent':{'action':'run_command', 'value':'/tp @p 20 70 20'}}
    ]}
    "
  }
}

Or add /powerblock command, so we can activate other command blocks within /tellraw.

There is a bug with the /tellraw, if you have a user click something in chat and run a command like the example dinnerbone used, it will run the command as if it was typed by the player, meaning that if the player can't use the command it will fail. So only admins would be able to interact with the tellraw.

Very good example!