You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Brenda Miller.

ASSISTANT: Ok.

USER: Due to some technical reasons my exams has been postponed. Can you change my reservation?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation was found on your name Mr. Miller.

USER: Ok, not a problem.

ASSISTANT: Thank you for availing our services.

USER: Thank you for your prompt service.