You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Cynthia Clark.

ASSISTANT: How may I aid you?

USER: Can you please aid me in changing my reservation as my exams got postponsed?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for considering my request.

ASSISTANT: Please hold on a moment, I will check the records.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to inform that, there are no reservation found on your given name.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thanks for reaching us, have a nice day.