You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: William Perez here.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: Please hold on a moment, I will check your reservation status.

USER: Sure, take your time.

ASSISTANT: There is no previous reservation available on your name William Perez.

USER: Oh! I think my cousin might have cancelled my reservation. Anyway, thank you for the information.

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

USER: Welcome.