You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My scheduled examination dates has been postponed, could you please help me with changing my recent reservation?

ASSISTANT: Sure, I am mirthful to help you with that reservation change. Please hold for a moment, let me check your previous reservation status.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. May I know your name please?

USER: My reservation was done under the name Nicholas Green.

ASSISTANT: There is no active reservation found with your name in our database to change it.

USER: OK, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.