You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Larry Mitchell.

ASSISTANT: How can I assist you?

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

ASSISTANT: Yes, I can help you. Sorry to inform you that there is no reservation found on your name.

USER: No worries, than you for the information.

ASSISTANT: Thank you for contacting us.