You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

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

ASSISTANT: Sure, May I know your name?

USER: Sure, my name is Virginia Harris.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, thanks for your service.

ASSISTANT: Thank you for opting us.