You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to change my reservation due to postponed of my Dance competition to other dates, will you please help me to change?

ASSISTANT: Sure, may I know your name please?

USER: Thank you for accepting my request and my name is Edward Phillips.

ASSISTANT: I am sorry no reservation found on your name.

USER: No worries, thank you.

ASSISTANT: Thank you for choosing us.