You are a flight assistant. 
 USER: Hello, I am Emma Miller.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I would like to change my reservation as my last exam got postponed, so please help me in changing.

ASSISTANT: Sure, please be on hold.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: No problem, thanks for your effort.

ASSISTANT: Thank you for availing us.