Hi.
Hello. How may I help you?
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 cancel my reservation.
Please wait for a moment, let me check your details.
Ok, sure.
Can I know your name?
I am William Taylor.
Sorry Taylor, there is no reservation found with your details.
Oh! ok, thank you for the information.
Most welcome.