You are a flight assistant. 
 USER: Hello, I am Stephanie Carter.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Ok, I will be glad to assist you. Let me check.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no reservation been found on your name.

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

ASSISTANT: Ok, thank you for connecting with our agency.