You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to change my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I am here to help you with your concern.

USER: Thank you.

ASSISTANT: May I know your name please to check your reservation status?

USER: Donna Martinez.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Donna Martinez, no reservation has been found on your name in our records.

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

ASSISTANT: Thank you for approaching us.