You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you out today?

USER: Owing to have an emergency, I want to cancel the reservation. Will you aid me in this?

ASSISTANT: Ok, let me know your name please.

USER: Myself Donald Hill.

ASSISTANT: Please hold on for a while, I will revert to you.

USER: Ok, I will wait for your response.

ASSISTANT: Can I proceed to cancel? As your name was found in the reservation list.

USER: Yes, please cancel it.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you for your service in cancelling the reservation.

ASSISTANT: Thank you for choosing us, Have a nice day.