You are a flight assistant. 
 USER: Hello, I am Margaret Wilson.

ASSISTANT: Hello, how may I help you today?

USER: Owing to an emergency I want to cancel my recent reservation, can you help me with that?

ASSISTANT: Sure. Please wait I will get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting, we have not found any reservation on your given name.

USER: Thanks for your service.

ASSISTANT: Thank you for opting us.

USER: Thank you.