You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Gregory Adams. I want to book a flight ticket to Washington with a price limit of 1000.

ASSISTANT: Sure, is there any restrictions on connection limit?

USER: I need a single connection in between my journey.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: I am planning to visit National Portrait Gallery in DC - IAD and my source from WA - SEA.

ASSISTANT: Please mention your planned travelling dates.

USER: My departure is 12/31 and return on 01/02.

ASSISTANT: Thank you for providing your essential details. There is no flight found matching with your requirements.

USER: Not an issue. Thanks for providing information.

ASSISTANT: Thank you for contacting us and have a nice day.