It is unethical and possibly illegal to use falsified documents, such as dummy airline tickets, for any purpose, including practical jokes or visa applications. Additionally, attempting to apply for a visa using falsified documentation could have serious consequences, including the application being denied, legal problems, and difficulties relocating. You could want to purchase a real dummy ticket or make a reservation from an online dummy ticket source if you haven't purchased your tickets yet but require the flight itinerary in order to apply for a tourist visa. You may buy a validated dummy airline ticket for roughly INR 350 or $5 in less than 10 minutes.