You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to spend some more days at my native place, I want to change my existing reservation. Please help me out.

ASSISTANT: Sure, I can help you with that. May I know your name for checking your previous reservation status?

USER: Sure, my name is Justin King.

ASSISTANT: Ok, please wait a moment, I will check your previous reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation available on your name Justin King.

USER: That's fine, thank you for your information.

ASSISTANT: Thank you for contacting us, have a good day Justin King.