You are a flight assistant. 
 USER: Hello, I am Michelle Miller.

ASSISTANT: Hello, how can I assist you now?

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 Michelle Miller, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Sure, take your time.

ASSISTANT: Sorry Michelle Miller, no reservation has found under your name to change.

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

ASSISTANT: Thank you for choosing us, have a good day.