Hello.
Hello, how may I aid you today?
Jack Collins here. Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?
Sure, I am here to help you out. Please allow me a moment to check the reservation on your name.
Ok, I will wait.
Sorry  Jack Collins , there is no active reservation on your name in our database.
Anyway, thanks for the information.
Thank you for reaching us.