Hello.
user
Hello, how may I help you?
assistant
I am planned for a trip, but it is postponed unexpectedly. So please help me to change my existing reservation.
user
Sure, may I know your name?
assistant
My name is Carol Adams.
user
Sorry, no reservation found on your name.
assistant
Its ok, thank you for the information.
user
Thank you for contacting us.
assistant
You are welcome.
user