You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Katherine Carter.

ASSISTANT: How can I oblige you?

USER: My business meeting has been postponed.I would like to change my existing reservation.

ASSISTANT: Ok.

USER: Can you please help me with changing?

ASSISTANT: Sure. Wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, There is no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thanks for choosing us.

USER: Thank you for your valuable information.