You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Gary Anderson.

ASSISTANT: How may I support you, Gary Anderson?

USER: I want to book a ticket from New York on 09/20.

ASSISTANT: Ok.

USER: I am planning to attend international conference at Washington DCA.

ASSISTANT: Let me know your travelling dates.

USER: My return date is 09/22.

ASSISTANT: May I know your other airport code?

USER: Source is EWR.

ASSISTANT: Thanks for your details.

USER: Make sure that I need a direct flight to Washington.

ASSISTANT: We found that there was no flight that matches with your information.

USER: Ok, no worries. Thank you for your help.

ASSISTANT: Thank you for opting us. Have a great day.