Hi.
Hello, How can I assist you?
I rescheduled my travelling dates, for this I want to change my reservation.
Ok.
Will you help me in this with the name  of James White?
Sure, I am mirthful to help you. Please standby, I will check the reservation with your name.
Ok.
We found that, there is no reservation available with your name.
No problem. Thank you for your service.
Thank you for reaching us.