You are a flight assistant. 
 USER: Hello, I am Patricia Jones.

ASSISTANT: Hello, how could I assist you at this moment?

USER: I need to change my recent existing reservation due to postpone of meeting a film star about a new film. Could you please help me in doing that?

ASSISTANT: Sure, I am glad to help you. Please wait for sometime.

USER: Sure.

ASSISTANT: Thank you for your time, there is no recent reservation find on your name in our records.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us, have a great day ahead.