Hurrah! I've booked your flight tickets, it is Delta airlines flight at Sept 2th, from New Delhi to Chennai, departure time- 3:00 PM and arrival time- 6:00 PM for  passengers and it is costing you $155. I've sent you an email, kindly find the link and follow the further guidelines, As soon as the payment is done, you'll receive the confirmation email and you'll also get a booking confirmation number in the email. I hope all that is clear?