You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, can I know your good name?

USER: Brandon Moore.

ASSISTANT: Please, wait a minute.

USER: Sure.

ASSISTANT: Sorry, we could not find any reservation on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.