You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I am Paul Moore. I need to attend a press conference at Washington DC-DCA, help me in booking my flight ticket from Atlanta GA-ATL.

ASSISTANT: Sure, Please help me with your travel dates.

USER: I would like to start on 11/05, my return date is on 11/07.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates. Thank you for opting us.

USER: Its ok, I will search other alternative, thank you for your help.