Hello.
Hello. How may I assist you?
I am Rebecca Carter. I need to change my reservation due to my planned event got postponed. So please  help me with changing my reservation.
Sure, I will help you.
Thank you.
Please wait a moment.
Sure, I will wait for your response.
Sorry there is no reservation on  your name.
Oh! it may not be booked properly due to server issues while booking. Anyway, thank you for your time.
Thank you.