Hello.
user
Hello. How may I assist you?
assistant
Unfortunately, I want to change my existing reservation due to some problems, can you please help me out?
user
Sure, can you help me with your name to proceed?
assistant
Sure, my name is Michelle Lopez.
user
Sorry, no reservation found on your name.
assistant
That's fine, anyways thank you for your information.
user
Thank you for choosing us, have a nice day.
assistant