You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am James Lee. I would like to visit Jimmy Carter library and museum which is in Atlanta GA-ATL, helps to learn new things. Could you please aid me in booking a plane reservation from Washington DC-DCA?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to depart on 05/13 from Washington. I intend to return on 05/15 from Atlanta.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there are no flights with your specifications.

USER: Ok, no worries at all.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your kind help.