You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Miller. Owing to an emergency, I want to cancel my reservation.

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

USER: Sure.

ASSISTANT: Thanks for your time. We found a reservation by this name. Shall I proceed it for cancellation?

USER: You can proceed to cancellation.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you for your service.

ASSISTANT: Thank you.