You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Karen Moore here.

ASSISTANT: How can I assist you Moore?

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 grandmother. Can you please help me out with cancelling of my reservation?

ASSISTANT: Sure, I can help you with that. Please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Moore, there is no reservation found under your name to do cancellation.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us, have a great day.