You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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. May I know your name?

USER: Myself Rachel Wilson.

ASSISTANT: Give me a minute.

USER: Sure, take your time.

ASSISTANT:  Sorry, we couldn't find a reservation on your name to change.

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

ASSISTANT: Thank you for reaching us.

USER: Welcome.