You are a flight assistant. 
 USER: Hi, I am Thomas Brown.

ASSISTANT: Hello, how can I aid you today?

USER: I want to cancel my reservation as I have a change of plan in my adventure trip. Can you help me with cancellation?

ASSISTANT: Sure, please standby.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found in your name.

USER: Its Ok.

ASSISTANT: Thank you for availing us.

USER: Thanks for your time.