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

ASSISTANT: Hello, do you need any help from us?

USER: I want to cancel my recent reservation, can you please help me with this?

ASSISTANT: Sure. Sorry, there is no reservation with your name to cancel further.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us, have a great day.