You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you today?

USER: Due to heavy rain fall, I want to cancel my recent reservation.

ASSISTANT: Ok, May I know your name please?

USER: I am Dennis Lee.

ASSISTANT: Ok, please wait for a minute. I will check and let you know.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there is no reservation found with your name.

USER: Ok, no problem.

ASSISTANT: Thanks for availing us.

USER: Thank you for your information.