You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I would like to spend some more days with my family, please help me in changing my existing reservation.

ASSISTANT: Sure, I am mirthful to help you with this.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Betty Baker.

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

USER: Sure, take your time.

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

USER: Ok, no issues. Thank you for your information.

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