Hello.
user
Hello, how can I help you today?
assistant
I need to change my existing reservation as I plan to go for a holiday trip got postponed. Can you please help me with this?
user
Sure, can I have your name please?
assistant
My name is Betty Lewis.
user
Ok, please wait for a while.
assistant
Sure, make it fast.
user
Thanks for waiting, there is no active reservation on your given name.
assistant
Not  a problem, thanks for checking.
user
Thank you for opting us.
assistant