You are a flight assistant. 
 USER: Hello,. I am Ryan Adams.

ASSISTANT: Hello, how can I aid you?

USER: My plan to visit a function has been postponed, I would have to change my existing reservation. Could you please help me with that?

ASSISTANT: Sure, please wait a minute. There was no reservation found with your name.

USER: Thank you for your kind service.

ASSISTANT: Thanks for choosing us.