Show firebase date using ternary operator

Hope you all are well

I just want to know that how can i show data from firebase using ternary operator.

return StreamBuilder<QuerySnapshot>(
        stream: FirebaseFirestore.instance
            .collection("AddBooking")
            .doc(FirebaseAuth.instance.currentUser!.uid)
            .collection("MyBook")
            .snapshots(),
        builder: (context, snapshot) {
          return snapshot.hasData
              ? ListView.builder(
              shrinkWrap: true,
              itemCount: snapshot.data!.docs.length,
              itemBuilder: (context, index) {
                DocumentSnapshot dc = snapshot.data!.docs[index];

By using this code i am able to get the data from the firebase it's ok the data is coming and showing and working perfectly. But i want to show the other else part if the data is not present then it should show that part. But i don't know why it's showing a black white page only showing the app bar on that page.

The ternary operator else condition is this:

: Column(
            children: [
              Padding(
                padding: EdgeInsets.fromLTRB(10, 80, 0, 0),
                child:
                Image.asset("assets/images/lv.png"),
              ),
              Container(
                height: 50,
                width: 140,
                child: FlatButton(
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(30.0),
                  ),
                  color: Color.fromARGB(255, 218, 162, 16),
                  onPressed: () {
                    Navigator.push(
                        context,
                        MaterialPageRoute(
                            builder: (context) => homeNavBar())); },
                  child: Center(
                    child: Text(
                      "Book a Flight",
                      style: GoogleFonts.limelight(
                        color: Colors.white,
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                  ),
                ),
              ),
            ],
          );

all this code is inside this

Widget list() {

And i am calling this in body.

If i put the else condition part in if it show only if mean only this first condition work if data present or not it ignores the second part.

Thanks i advance