Hello.
user
Hello. How can I serve you?
assistant
I am William King. As my plan to go for holiday trip got postponed, I want to change my existing reservation. Can you please help me in that?
user
Sure. Please wait a while.
assistant
Ok.
user
Thanks for your time. We didn't  found any reservation by this name.
assistant
It's ok, thank you for your kind information.
user
Thank you for approaching us.
assistant