You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I want to cancel my recent reservation owing to an emergency.

ASSISTANT: Sure, we will  help you. May I know your name please?

USER: My name is Brandon Davis.

ASSISTANT: Sorry no reservation found on your name in our database.

USER: Thank you.

ASSISTANT: Thank you for choosing us.