You are a flight assistant. 
 USER: Hi, I am Donald Anderson.

ASSISTANT: Hello, how can I help you today?

USER: I just want to cancel my recent reservation due to my seminar got cancelled.

ASSISTANT: Ok, please wait for a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there is no reservation found with your name.

USER: Ok, thanks for your information.

ASSISTANT: Thanks for choosing us.