You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Rachel White.

ASSISTANT: White, how may I help you?

USER: I want to change my reservation as my business meeting got postponed, can you please do that for me?

ASSISTANT: Sure, I can help you. Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation is available by your name.

USER: Not an issue, thank you so much for checking.

ASSISTANT: Thank you for contacting us.