You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Nelson.

ASSISTANT: How may I help you today?

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

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

USER: Thank you.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.