Hello.
user
Hello, how may I help you?
assistant
My name is Nancy Wilson.
user
 Nice to meet you Nancy Wilson.
assistant
As my brother's marriage got postponed, I would like to change my reservation.
user
Oh! ok, please wait, I will check it and let you know the details of your previous flight.
assistant
Ok.
user
Sorry to inform you, there is no reservation found with your name to change.
assistant
It's ok. Thank you for your information.
user
My pleasure.
assistant