You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Adams.

ASSISTANT: How can I aid you?

USER: Can you please help me in changing my existing reservation to New York? As my meeting got postponed at New York.

ASSISTANT: Sure, please allow me a moment to check for your previous reservation status.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting. Sorry to say, there is no active reservation have been found under your name in our database to amend it.

USER: Oh! May be something went wrong while booking the ticket previously. Anyways, thank you for providing information.

ASSISTANT: Thank you for reaching us..