You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Steven Hernandez want to cancel my reservation owing an emergency operation.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Thank you for your response.

ASSISTANT: Thanks for reaching us, have a good day.