Hi,.
user
Hello, how can I support you today?
assistant
I am Sarah Scott. I want to change my existing reservation as my interview got postponed. Can you help me out with it?
user
Sure, I am glad to help you. Please hold on, I will check the availability of existing reservation to change it and get you back.
assistant
Sure.
user
Thank you for waiting, Unfortunately there is no reservation found with your name.
assistant
OK. Thanks for your response.
user
Thank you for choosing us, Have a nice day.
assistant