You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Please cancel my recent reservation owing to an emergency.

ASSISTANT: Sure, I will help you with cancellation. May I know the name on which reservation is done?

USER: My name is Justin Lee.

ASSISTANT: Please wait for a moment, while I search for your reservation.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: Thanks.

ASSISTANT: Thank you for visiting us, we hope see you again.