Hi.
user
Hello, how may I aid you?
assistant
Can you please change my existing reservation? Because I need to attend to an emergency meeting at other place.
user
Sure, let me know your good name please.
assistant
So, please change my reservation which is reserved under my name Mary Allen.
user
Ok,  please wait a while.
assistant
Ok.
user
Thank you for your time. Unfortunately there is no reservation found by your name.
assistant
Ok, Thanks for sharing the valuable information.
user
Thank you for availing us.
assistant