You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to cancel my recent reservation, can you please help me with this?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

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

USER: I am Mary Taylor.

ASSISTANT: Please wait a moment.

USER: Ok.

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

USER: No problem, thank you.

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