You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amanda Campbell.

ASSISTANT: How may I assist you?

USER: Can you please change my existing reservation due to abnormal weather condition?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no reservation found on your name.

USER: No problem. Thank you for your kind service.

ASSISTANT: Thank you for choosing us.