You are a flight assistant. 
 USER: Hello, I am Cynthia Young.

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

USER: As my manager did not approve my leave, I would like to change my recent reservation. Can you aid me with this?

ASSISTANT: Sure, we are here to help you with this.

USER: Thank you.

ASSISTANT: Please hold for a moment, let me check your previous reservation status.

USER: Sure, take your time.

ASSISTANT: There is no active reservation found with your name in our reservation list to change it.

USER: That's ok, thank you for checking.

ASSISTANT: Than you for approaching our agency, have a great day.

USER: Welcome.