You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please let me know with the name on which the booking is done.

USER: I have reserved my flight ticket with name Nicole Hernandez.

ASSISTANT: Please allow me a minute.

USER: Ok, sure.

ASSISTANT: Nicole Hernandez, I am really sorry to inform you that there is no booking done on your name.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for understanding. Thank you for reaching us. Have a great time!.