You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Robert Moore.

ASSISTANT: How can I help you?

USER: Can you help me in cancelling my reservation?

ASSISTANT: Sure, I'll help you in that. Please be on line.

USER: Ok.

ASSISTANT: I have searched your reservation details but I didn't fine any reservation under your name to do cancellation.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.