You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Evening. What can I do for you?

USER: Good Evening, this is John Hernandez. I just want to cancel my recent reservation.

ASSISTANT: Sure,  just a moment. Sorry John, I couldn't find any existing reservation with your name.

USER: It's OK. Thank you for your information.

ASSISTANT: Thank you for contacting us. Have a good day John.