You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I need you to cancel my recent booking, please help me.

ASSISTANT: Sure, may I know your name please?

USER: My name is Dorothy Mitchell.

ASSISTANT: Sorry, we could not find any reservation on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching us.