You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to cancel my reservation due to heavy rainfall in my own city, help me in cancelling my reservation.

ASSISTANT: Sure, we are here to assist you. May I know your good name?

USER: I am Helen Green.

ASSISTANT: Thank you for sharing your good name, please hold on.

USER: Ok.

ASSISTANT: No reservation found on your name.

USER: Its ok, thank you for your help.

ASSISTANT: Thank you for choosing us, have a nice day.