You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, may I know your name please?

USER: William Baker.

ASSISTANT: Wait a while, kindly.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation found for the user name in our back end to cancel it.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for opting us.