Hello.
Hello, how may I assist you today?
Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?
 Sure, may I know your name?
My name is Joshua Edwards.
Please wait a moment.
Ok, I will wait.
Sorry, there are no active reservations on your name to change.
Anyway, thanks for the information.
Thank you for reaching our service.