You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you now?

USER: Can you please help me to cancel my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

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

USER: I am Janet Lopez.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

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

USER: That's ok, thank you for checking.

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