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              onPressed: () {
                var alertDialog = AlertDialog(
                  title: Text("Flight Booked Succesful"),
                  content: Text("Have a pleasent flight"),
                );
                showDialog(
                    context: context,
                    barrierDismissible: true,
                    builder: (BuildContext context) {
                      return Dialog(
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(10.0),
                          ),
                          child: Container(
                            height: 350.0,
                            width: 200.0,
                            decoration: BoxDecoration(
                              borderRadius: BorderRadius.circular(100.0),
                            ),
                            child: Column(
                              children: <Widget>[
                                Stack(
                                  children: <Widget>[
                                    Container(
                                      height: 150.0,
                                    ),
                                    Container(
                                      height: 100.0,
                                      decoration: BoxDecoration(
                                        borderRadius: BorderRadius.only(
                                          topLeft: Radius.circular(10.0),
                                          topRight: Radius.circular(10.0),
                                        ),
                                        color: Colors.teal,
                                      ),
                                    ),
                                    Positioned(
                                      top: 50.0,
                                      left: 94.0,
                                      child: Container(
                                        height: 90.0,
                                        width: 90.0,
                                        decoration: BoxDecoration(
                                            borderRadius:
                                                BorderRadius.circular(45.0),
                                            border: Border.all(
                                                color: Colors.white,
                                                style: BorderStyle.solid,
                                                width: 2.0),
                                            image: DecorationImage(
                                                image: NetworkImage(
                                                    'https://upload.wikimedia.org/wikipedia/commons/3/36/Hopetoun_falls.jpg'),
                                                fit: BoxFit.cover)),
                                      ),
                                    )
                                  ],
                                ),
                                SizedBox(height: 20.0),
                                Padding(
                                  padding: EdgeInsets.all(10.0),
                                  child: Text(
                                    "Fountain",
                                    style: TextStyle(
                                      fontSize: 14.0,
                                      fontWeight: FontWeight.w300,
                                    ),
                                  ),
                                ),
                                SizedBox(
                                  height: 15.0,
                                ),
                                FlatButton(
                                  
                                  child: Center(
                                    child: Text(
                                      "Okay",
                                      style: TextStyle(
                                          fontSize: 14.0, color: Colors.teal),
                                    ),
                                  ),
                                  onPressed: () {
                                    Navigator.of(context).pop();
                                  },
                                ),
                              ],
                            ),
                          ));
                    });