You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you now?

USER: Please help me to change my recent reservation.

ASSISTANT: Sure, I am happy to help you. May I know your name to check your reservation status?

USER: I am Scott Hall.

ASSISTANT: Ok, please be on hold.

USER: Ok.

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

USER: No problem, thanks for your information.

ASSISTANT: Thank you for opting us.