You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Karen Jones here.

ASSISTANT: How may I help you?

USER: I have to cancel my reservation which I have done earlier to participate in dance programme but unfortunately I have stay back here to take care of my injured friend. Can you please help me out with cancelling of my reservation?

ASSISTANT: Sure, I will help you in cancellation of flight ticket.

USER: Thank you for considering my request.

ASSISTANT: Wait for a moment please.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: It's right.

ASSISTANT: Sorry to say that I could not find your flight reservation to cancel it.

USER: Oh! I think it might be cancelled by my brother. Anyway, thank you for the information.

ASSISTANT: Thank you.

USER: Welcome.