You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am George Carter.

ASSISTANT:  How can I help you?

USER: Due to some problems my trip post pone, can you please change my existing reservation?

ASSISTANT: Sure, just a  second please.

USER: Ok.

ASSISTANT: No reservation found on your name Mr.George Carter.

USER: It's ok. Thank you for your information.

ASSISTANT: Thank you for reaching us.