You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Wright.

ASSISTANT: How can I aid you?

USER: I need a direct flight to Washington, can you aid me in booking a flight ticket from DCA to IAD?

ASSISTANT: Sure. May I know your travelling dates?

USER: 06/26 and 06/28 are my travelling dates.

ASSISTANT: Do you have any specifications?

USER: 500 is my budget.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There is a flight 1009 in UA airline and price 500 with a connection. Shall I proceed?

USER: No, I need a direct flight. Thanks for your service.

ASSISTANT: Ok, Thanks for choosing us.