You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Anthony Nelson here.

ASSISTANT: How can I help you today?

USER: As my dates for my business meeting has been postponed in Charlotte. So can you change my flight ticket reservation?

ASSISTANT: Sure, I am here to help you with this reservation change.

USER: Ok.

ASSISTANT: Please hold for a moment, let me check your previous reservation status.

USER: Sure.

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

USER: Not a problem. Thank you.

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