Hello.
user
Hello. How may I aid you?
assistant
   My Interview was pre-planned at the last minute, will you please help me to change it as soon as possible?
user
Sure. May I know your name please?
assistant
My name is Michael Evans.
user
Thanks for waiting patiently. But I regret to inform you that that there is no flight reservation on your name to change it.
assistant
 That's ok, thank you for the response.
user
Thank you.
assistant