You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to change my existing reservation due to bad weather condition, can you please help me with that?

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

USER: My name is George Johnson.

ASSISTANT: Ok, please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry no reservation found on your name.

USER: No problem, thank you.

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