You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I support you today?

USER: Please cancel my recent reservation.

ASSISTANT: Sure, may I know your good name please?

USER: I am Samantha Johnson.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry to say you no reservation found with your specifications.

USER: Thank you.

ASSISTANT: Thank you for choosing us.