You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I want to change my reservation due to postponed of my fashion show competition, so please help me.

ASSISTANT: Sure, May I know your name?

USER: Sure, my name is Edward Collins.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: No issues, thank you.

ASSISTANT: Thank you for opting us.