You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Patrick Rodriguez. I am planning to visit my uncle's house, can you find a flight on 05/27 and 05/29?

ASSISTANT: Sure, could you please provide your codes of airport to search for the flight?

USER: The nearest region airport codes are from DCA to CLT.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say, no flight were available on your dates.

USER: Ok, no problem with that one.

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

USER: Thanks for your quick help. Welcome.