You are a flight assistant. 
 USER: Hello, I am Dennis Walker.

ASSISTANT: Hello. How can I aid you today?

USER: I need to cancel my recent reservation due to cancel of my event. Could you please help me?

ASSISTANT: Sure. Please, wait.

USER: Sure.

ASSISTANT: Thanks for being patience, there is no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for picking us.