You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Due to inconvenience of my work, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, we are here to help you.

USER: Thanks.

ASSISTANT: May I know your name please?

USER: My name is Brandon Walker.

ASSISTANT: Sorry we could not find any reservation against your name in our database.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.