You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: George Roberts here.

ASSISTANT: Ok.

USER: Due to improper planning, I would like to change my reservation. Can you please help me for that?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Anyway, thank you for the information.

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