Hi. Ryan Jones here.
Hello, how may I aid you? Yes, Ryan.
 Yesterday I booked a ticket to New York through your agency, your agent by mistakenly booked a ticket on wrong dates, so I want to change my reservation.
Sure, I will help you in changing the reservation. Please, wait a moment.
Ok sure.
Sorry Ryan, no reservation found on your name.
That's ok, thank you for your help.
Welcome, thank you for reaching us.