You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I aid you today?

USER: I am Margaret Thomas want to cancel my reservation owing an emergency. Can you please help me in cancelling?

ASSISTANT: Please wait a moment, let me check and revert to you.

USER: Ok.

ASSISTANT: We are sorry to inform, we did not found any reservation on your given name.

USER: Thank you for your response.

ASSISTANT: Thank you for reaching us.