You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

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

ASSISTANT: I am glad to help you about that, can you please let me know your name for checking the active reservation under your name?

USER: Myself Paul White.

ASSISTANT: Please be on hold to check in our data base.

USER: Sure, take your time.

ASSISTANT: Sorry to say this Paul White, I am not able to find even a single active reservation under your name for changing your reservation.

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

ASSISTANT: You are welcome, thank you for reaching us.