You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Robert Scott.

ASSISTANT: How can I aid you for the day?

USER: I want to change my existing reservation due to bad weather condition, can you please help me with that?

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

USER: Thank you.

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

USER: Sure.

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

USER: Not an issue, thank you.

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