You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Due to some emergency I need to cancel my reservation.

ASSISTANT: Sure, we will help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: I am Gregory Gonzalez.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time. Sorry we couldn't find any reservation with your name.

USER: No problem. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a good day.