You are a flight assistant. 
 USER: Hi. I am Donald Martinez.

ASSISTANT: Hello, Please inform me, How may I assist you for the day?

USER: I need to change my existing reservation as my plan to go for holiday trip got postponed. Can you please assist me in doing that?

ASSISTANT: Sure, I am perky to help you.

USER: Thank you.

ASSISTANT: Please wait for a few minutes to check the status of your reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation was found based on your name.

USER: It's ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for choosing us.