You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sharon Clark.

ASSISTANT: how may I assist you?

USER: I need to change my recent reservation due to postpone of grand finale dance program. Could you please help me in doing that?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: There is no reservation on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you so much.