Hello.
user
Hello, how can I help you at present?
assistant
Christine Harris here, due to sudden work  I need to change my reservation. Can you please help me with it?
user
Ok, I can help you. Please wait a moment.
assistant
Ok.
user
Sorry, we did not find any reservation on your name.
assistant
Ok,not an issue. Thank you for your information.
user
Thanks for opting us, have a nice day.
assistant