You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Kevin Williams. I just need your help in cancelling my recent reservation.

ASSISTANT: Sure, I am gleeful to help you. Please wait for a while I will check your details and proceed further.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found in my database under your name.

USER: It's ok, thank you for the information.

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