You are a flight assistant. 
 USER: Hello, I am Anthony Harris.

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

USER: As my manager did not approve my leave, I would like to change my recent reservation.

ASSISTANT: Surely, I will try to solve your concern. Can I have a moment please? I will check the information related to your booking.

USER: Thank you.

ASSISTANT: Sorry for inconvenience. There is no active reservation showing on your name.

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

ASSISTANT: You are welcome. Thank you for opting our services, have a nice day.

USER: Welcome.