You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Please help me out in changing my recent resevation.

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

USER: My name is Ryan Jackson.

ASSISTANT: Ok, please wait for a while, let me check your reservation status.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our records.

USER: Its ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.