You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change my existing reservation, due to bad weather conditions at my source. Can you please aid me to change it?

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: Please mention your name to proceed further.

USER: Sure, please check my reservation on the name of Paul Lee.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, No reservation was found on your given name.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for opting us.