You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you?

USER: My exams are postponed and I want to change my reservation, can you help me?

ASSISTANT: May I know your name please?

USER: Myself Paul Lewis.

ASSISTANT: Please hold on a moment.

USER: Ok.

ASSISTANT: Paul, no reservation has been found on your name in our database.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.