Help me creating the proper Utterances for Choice block

I am new to voice flow. I’m exploring the features of voice flow by creating sample projects. In that, I have created a project which should ask for a User ID from the user. Assume the User ID is a Four DIGIT number. After getting the proper USER ID, it will make a GET request to Firebase to fetch the user data by using the user id.

Now the problem is that when I am testing with the simulator, it doesn’t get the correct user id. Instead, it takes ‘0’ as user id. please get rid of me.