title: How to get output text when using watson conversation api
body: <p>I have created a workspace and created the intent, entities and dialogs for a conversation service
  Where we use the launch tool and "try it out", i can see the watson text response for the question i asked. But however when i use the api command via a rest client, it does not return the text output.
  The input i used for the api was </p>
  
  <pre><code>{
    "input": {
      "text": "increase the temperature of ac"
    }
  }
  </code></pre>
  
  <p>and as response i got the following</p>
  
  <pre><code>{
  "input": {
  "text": "increase the temperature of ac"
  }-
  "context": {
  "conversation_id": "5a7ce4c2-c6be-4cb8-b728-19136457bf28"
  "system": {
  "dialog_stack": [1]
  0:  "root"
  -
  "dialog_turn_counter": 1
  "dialog_request_counter": 1
  }-
  }-
  "entities": [1]
  0:  {
  "entity": "appliance"
  "location": [2]
  0:  28
  1:  30
  -
  "value": "ac"
  }-
  -
  "intents": [1]
  0:  {
  "intent": "turn_up"
  "confidence": 0.9854193755106732
  }-
  -
  "output": {
  "log_messages": [0]
  "text": [0]
  "nodes_visited": [1]
  0:  "node_1_1469526692057"
  -
  }-
  }
  </code></pre>
  
  <p>It doesnot have any text message in the json output</p>