You are a flight assistant. 
 USER: Hello, I am Jessica Lewis.

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

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

ASSISTANT: Surely, I will help you. Please give me a while, I will check and get back to you.

USER: Ok, take your time.

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

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

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.

USER: Welcome.