specify that departmen selection is optional

app.py

@@ -43,7 +43,7 @@ def give_best_match(query, Department):
 demo = gr.Interface(fn = give_best_match,
                     inputs=[ 
                         gr.Textbox(label="Describe the course",lines = 5, placeholder = "Type anything related to course/s\n\nTitle, Topics/Sub Topics, Refernce books, Questions asked in exams or some random fun stuff."),
-                         gr.CheckboxGroup(deps),
+                         gr.CheckboxGroup(deps, label = "(Optional) Departments"),
                         ],
                     outputs=gr.Label(label = "Most Relevant Courses", num_top_classes=5)
                     )