You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you out?

USER: My name is Kenneth Jones, and I just want to cancel my reservation. Do you help me with that?

ASSISTANT: Sure, Kenneth Jones, we are here to help you out. Please wait for a while.

USER: OK,.

ASSISTANT: Thanks for your patience. Sorry, we did not find any reservation to cancel.

USER: OK, thank you.

ASSISTANT: Thanks for choosing us. Have a nice day.