You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Can you please be my helping hand to change my existing reservation, due to bad weather conditions?

ASSISTANT: Sure, I am here to help you. May I know your name please?

USER: Sure, my name is Daniel Smith.

ASSISTANT: Ok, please wait for a few minutes.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found on your name to change.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.