Hi. My name is Nicholas Harris.
user
Hello, how may I guide you today?
assistant
I want to change my recent reservation as my joining date got postponed. Can you help me in changing?
user
Sure. Please give me some time.
assistant
Ok.
user
Thanks for being patient. We did not found any reservation on your name to change.
assistant
No problem, thank you for the information.
user
Thank you  for choosing us, have a good day.
assistant