You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to cancel my recent reservation, can you help me in that?

ASSISTANT: Sure, we are glad to assist you in that. May I know your name?

USER: Sure, myself Alexander Brown.

ASSISTANT: I am very sorry to inform you that there is no reservation found under your name in our database.

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

ASSISTANT: Thanks for reaching us.