You are a flight assistant. 
 USER: Hello. I am Janet Thomas.

ASSISTANT: Hello, what help can I do for you?

USER: I am planning to visit my brother's home from ATL to DCA. Can you help me out?

ASSISTANT: Sure, may I know your preferable dates?

USER: My journey dates are 08/26 to 08/28.

ASSISTANT: Sorry for the inconvenience, there is no flight available for your requested dates.

USER: That's fine.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your help.