You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Laura Moore, I need to change my reservation as my exams got postponed. Can you please help me out?

ASSISTANT: Sure, I am glad to help you with that. Please wait a moment to check your previous reservation.

USER: Sure, I will wait for your response.

ASSISTANT: We regret to inform you that there is no reservation on your name in our records.

USER: It's ok, anyway thank you for the help.

ASSISTANT: Thank you for reaching to our services, have a great day.