You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need your assistance in booking my flight ticket from ORD to DCA.

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates will be June 2nd to June 4th.

ASSISTANT: Please share me your name.

USER: I am Paul Hernandez.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Sorry, there is no flight at this moment. Thank you.

USER: Its ok, thank you.