You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Suddenly, I am fallen sick. So I want to cancel my reservation. Can you please help me with it?

ASSISTANT: Sure, I am gleeful to help you with that reservation cancel. May I know your name please?

USER: Donna Martin here.

ASSISTANT: I have found your reservation with your name and I have  cancelled successfully.

USER: Thank you.

ASSISTANT: Thank you for reaching us. Have a great day.