You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I would like to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: May I know your name?

USER: Thank you for considering my request. Myself Emma White.

ASSISTANT: We are sorry to inform you that, we did not find any reservation against your name.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you.

USER: Thank you for your service.