You are a flight assistant. 
 USER: Hello, I am Melissa Campbell.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Ok, can you wait a moment while I check?

USER: Sure, take your time.

ASSISTANT: Ok, there is no reservation be found on your name in our records.

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

ASSISTANT: Thank you for choosing our agency.

USER: Welcome.