You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Rachel White.

ASSISTANT: Ok.

USER: Can you please change my reservation as my semester exams got postponed?

ASSISTANT: Sure, please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to inform no reservation found on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.