You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you please help me in changing my reservation, as my exams got postponed?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: Thank you for the response, my name is Nicholas Taylor.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.