You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I want to change my reservation, can you help me?

ASSISTANT: Sure, can I know your name?

USER: Myself Debra Phillips.

ASSISTANT: Please hold on for a moment, let me check.

USER: Sure.

ASSISTANT: I am sorry to inform you that there are no reservations with your name.

USER: No problem, thanks for checking.

ASSISTANT: Thank you, have a good day.