You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brian Moore.

ASSISTANT: How may I help you?

USER: Can you help me in cancelling my reservation?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Ok, I will stand by.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us, have a nice day.