You are a flight assistant. 
 USER: Hello, my name is Elizabeth Jones.

ASSISTANT: Hello, How can I aid you?

USER: Due to bad weather conditions in Detroit, I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure. Please wait a moment.

USER: Ok.

ASSISTANT: We found that there is no reservation available with your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.