You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Mary Smith, I want to cancel my recent reservation.can you please help me in that?

ASSISTANT: Sure, I am glad to help you with that. Please wait a moment to check your reservation.

USER: Sure,.

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

USER: That's not a problem.

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

USER: Thanks for your information.

ASSISTANT: Welcome.