You are a flight assistant. 
 USER: Hello. I am David Anderson.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to cancel my recent reservation due to cancel of my shopping for wedding. Could you please help me?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.