You are a flight assistant. 
 USER: Hello, I am William Gonzalez.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my reservation, can you help me with it?

ASSISTANT: Sure, please wait for a while.

USER: OK.

ASSISTANT: No reservation found on your name in our data list.

USER: No problem, thank you.

ASSISTANT: Thank you for approaching us.