You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: Katherine Perez here. Owing to an emergency I have request you to cancel my reservation. Can you please help me out?

ASSISTANT: Please wait a moment to check your previous reservation status.

USER: Sure, take your time.

ASSISTANT: No reservation found on your name.

USER: Oh, I think my brother had cancelled my reservation. Anyway, thank you for the information.

ASSISTANT: Thank you for choosing us.

USER: Welcome.