You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you 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: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: For changing, we need your name. Please mention it.

USER: Myself Jessica Carter.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

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

ASSISTANT: Thank you for opting us.

USER: Welcome.