You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How may I assist you?

USER: I want to book a flight ticket with the name Anthony Harris on 11/19, please help me with a connecting flight.

ASSISTANT: Sure. May I know  travelling airport codes?

USER: I want to fly from DC- DCA to NY- JFK.

ASSISTANT: Please specify your return date.

USER: I want to return on 11/21.

ASSISTANT: No flights available for your requirement.

USER: Ok, no issues.

ASSISTANT: Thanks.

USER: Thank you.