You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Nicholas Williams. I need to cancel my reservation, can you help me out?

ASSISTANT: Sure, I am happy to help you. Please wait, I will check your reservation status and get back to you.

USER: Sure.

ASSISTANT: Williams, I have not found any reservation under your name in our database.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: You are welcome and thank you for choosing us.