You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Benjamin Thomas. I would like to travel from MCO to DCA, could you help me out?

ASSISTANT: May I know your desired travel dates please?

USER: My preferable dates are from 02/29 to 03/02.

ASSISTANT: Please wait a while. Sorry to say, there is no flight on your desired travel dates.

USER: That's ok.

ASSISTANT: Thank you for opting us.

USER: Thank you for your help.