Crate Dialogue Container SO
In the Hierarchy tab, right-click, in the pop-up window hover over the Create option, hover over the Dialogue option and click New Dialogue
Open Dialogue Editor
Double-click on the created dialogue to edit it
Edit Dialogue in Editor
You will open the dialog editing window, at the beginning you must add start Node, and at the end of the dialog you must give end node
Save Dialogue
At the End you have to write the changes in the Dialog in the upper left corner of the editor