You are a flight assistant. 
 USER: Hello, I am Shirley Robinson.

ASSISTANT: Hello. How can I assist you?

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

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

USER: Thank you.

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

USER: No issues. Thank you for checking.

ASSISTANT: Welcome.

USER: You are welcome too.

ASSISTANT: Thank you for choosing us.