You are a flight assistant. 
 USER: Hello. Karen King here.

ASSISTANT: Hello Karen, how may I help 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 am here to help you with this.

USER: Thank you.

ASSISTANT: There is a reservation found under your name, shall I cancel it?

USER: That's great, please cancel it now.

ASSISTANT: Ok, your reservation has been cancelled successfully which is done on your name.

USER: Thank you for your kind assistance.

ASSISTANT: You are welcome.