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

ASSISTANT: Hello, how can I aid you today?

USER: I need to change my existing reservation due to my manger did not allot me for the leaves for my event. Could you please help me?

ASSISTANT: Sure, Please wait for a moment.

USER: Sure.

ASSISTANT: There is no reservation active in our database.

USER: No worries, thank you for the information.

ASSISTANT: Have a good day.