Parse JSON object to string array in swift

I have the following Json response.

{
  "language": "en",
  "textAngle": 0,
  "orientation": "Up",
  "regions": [
    {
      "boundingBox": "96,29,244,474",
      "lines": [
        {
          "boundingBox": "96,29,58,12",
          "words": [
            {
              "boundingBox": "96,29,58,12",
              "text": "SG4207"
            }
          ]
        },
        {
          "boundingBox": "97,64,159,16",
          "words": [
            {
              "boundingBox": "97,65,27,15",
              "text": "Eng"
            },
            {
              "boundingBox": "129,64,34,16",
              "text": "Lieh,"
            },
            {
              "boundingBox": "168,65,37,12",
              "text": "Yuen"
            },
            {
              "boundingBox": "212,65,44,15",
              "text": "Kwan,"
            }
          ]
        },
        {
          "boundingBox": "97,99,243,16",
          "words": [
            {
              "boundingBox": "97,99,52,13",
              "text": "Mobile"
            },
            {
              "boundingBox": "154,99,64,13",
              "text": "Wireless"
            },
            {
              "boundingBox": "223,99,62,13",
              "text": "Solution"
            },
            {
              "boundingBox": "291,99,49,16",
              "text": "Design"
            }
          ]
        },
        {
          "boundingBox": "97,134,117,16",
          "words": [
            {
              "boundingBox": "97,134,44,16",
              "text": "Darryl"
            },
            {
              "boundingBox": "147,134,27,13",
              "text": "and"
            },
            {
              "boundingBox": "179,134,35,16",
              "text": "Ajith"
            }
          ]
        },
        {
          "boundingBox": "96,169,71,16",
          "words": [
            {
              "boundingBox": "96,169,71,16",
              "text": "Weekday"
            }
          ]
        },
        {
          "boundingBox": "97,205,72,16",
          "words": [
            {
              "boundingBox": "97,205,72,16",
              "text": "(Monday)"
            }
          ]
        },
        {
          "boundingBox": "96,241,80,15",
          "words": [
            {
              "boundingBox": "96,244,32,12",
              "text": "gam"
            },
            {
              "boundingBox": "133,248,5,1",
              "text": "-"
            },
            {
              "boundingBox": "143,241,33,15",
              "text": "5pm"
            }
          ]
        },
        {
          "boundingBox": "96,275,72,13",
          "words": [
            {
              "boundingBox": "96,275,72,13",
              "text": "Weekend"
            }
          ]
        },
        {
          "boundingBox": "97,310,77,16",
          "words": [
            {
              "boundingBox": "97,310,77,16",
              "text": "(Saturday)"
            }
          ]
        },
        {
          "boundingBox": "96,347,80,15",
          "words": [
            {
              "boundingBox": "96,350,32,12",
              "text": "gam"
            },
            {
              "boundingBox": "133,354,5,1",
              "text": "-"
            },
            {
              "boundingBox": "143,347,33,15",
              "text": "5pm"
            }
          ]
        },
        {
          "boundingBox": "97,382,41,15",
          "words": [
            {
              "boundingBox": "97,382,41,15",
              "text": "3-Apr"
            }
          ]
        },
        {
          "boundingBox": "97,417,45,15",
          "words": [
            {
              "boundingBox": "97,417,8,12",
              "text": "1"
            },
            {
              "boundingBox": "115,417,27,15",
              "text": "Apr"
            }
          ]
        },
        {
          "boundingBox": "97,452,48,15",
          "words": [
            {
              "boundingBox": "97,452,48,15",
              "text": "ID-Apr"
            }
          ]
        },
        {
          "boundingBox": "96,488,42,15",
          "words": [
            {
              "boundingBox": "96,488,42,15",
              "text": "8-Apr"
            }
          ]
        }
      ]
    }
  ]
}

Need to create a String array from the above json in Swift3. Tried the following

if dictionary["regions"] != nil {

    // Get Regions from the dictionary
    let regions = (dictionary["regions"] as! NSArray).firstObject as? [String:AnyObject]

    // Get lines from the regions dictionary
    let lines = regions!["lines"] as! NSArray


    // Get words from lines
    let inLine = lines.enumerated().map {($0.element as? NSDictionary)?["words"] as! [[String : AnyObject]] }

    // Get text from words
    let extractedText = inLine.enumerated().map { $0.element[0]["text"] as! String}
    return extractedText
} else {
        return [""];
    }

But did not get the actual String.