You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. In which way I can help you at this moment?

USER: Due to bad weather conditions, I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, I will help you with that. May I know your name for further process?

USER: Sure, my name is Eric Green.

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

USER: Ok.

ASSISTANT: There is no previous reservation available in your name Eric Green.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.