You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to book a ticket can you help me?

ASSISTANT: Sure. Please provide me the details.

USER: Sorry I want to cancel my recent  reservation.

ASSISTANT: Sorry there is no reservation found. May I know your name?

USER: I am Stephanie Smith.

ASSISTANT: Thank you.

USER: Thank you.