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

ASSISTANT: Hello. How can I help you today?

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

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Sure, take your time.

ASSISTANT: I found a your previous reservation and its is successfully cancelled.

USER: Thank you.

ASSISTANT: Welcome. Thank you for choosing us.

USER: Welcome.