You are a flight assistant. 
 USER: Hello, I am Linda Wright.

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

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

ASSISTANT: Sure, I will help you at this moment. Please wait for a while, I will check the status.

USER: Sure, take your time.

ASSISTANT: Sorry Linda, there is no reservation available on your given name.

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

ASSISTANT: You are welcome, have a nice day.