You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you today?

USER: I am Helen Mitchell,can you aid me to cancel my ticket?

ASSISTANT: Sure, please give me a moment.

USER: Ok.

ASSISTANT: We are sorry to inform you that there is no reservation found with your given name.

USER: No issue, thank you.

ASSISTANT: Thank you for availing us.