You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I want to cancel my recent ticket because the meeting which is held at San Francisco is cancelled. Can you please help me to cancel the ticket?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for accepting my request.

ASSISTANT: Can I know your name to check your previous reservation?

USER: My name is Jeffrey Gonzalez.

ASSISTANT: Please hold on a moment.

USER: Ok, take your time.

ASSISTANT: We regret to inform you that, there is no reservation found on your name in our records.

USER: It's ok, not a problem with that. Anyways thank you for helping me.

ASSISTANT: Thank you for reaching us, have a great day.

USER: You are welcome.