You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: Due to bad weather, I am suddenly fallen ill so, please cancel my reservation.

ASSISTANT: Sure, I will help you with that. May I know your name please?

USER: Thank you. Ok, My name is Donna Johnson.

ASSISTANT: Ok, please hold on. I will check the present status of your reservation.

USER: OK.

ASSISTANT: Thanks for waiting. We regret that, there is no active reservation found with your name to cancel it.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thanks for opting us.