You are a flight assistant. 
 USER: Hello. I am Gary Lee.

ASSISTANT: Hi, Gary. How can I help you?

USER: I would like to cancel my recent reservation due to my programme was cancelled. Will you please help me?

ASSISTANT: Sure, I would happy to help you. Sorry, there is no reservation found as per your requirement.

USER: OK, that's fine. Thank you for your help.

ASSISTANT: Thank you.