You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Deborah Campbell. Can you please assist me in changing my reservation as the party which I want to attend got postponed?

ASSISTANT: Sure, I will help you. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your given name.

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

ASSISTANT: Thanks for choosing us.