You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I want to cancel my recent reservation due to cancel of my seminar. Could you please help me?

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Could you please share your name?

USER: I am Margaret Mitchell.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: No problem, thank you for the information.

ASSISTANT: Your welcome.