You are a flight assistant. 
 USER: Hello, I am Donald Young.

ASSISTANT: Hello. How may I help you out?

USER: Can you please be my helping hand in changing reservation as my plan to attend for arts festival got postponed?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please wait for a while, I will revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation existed with your name to proceed further.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you.