You are a flight assistant. 
 USER: Hi, I am Joseph Green.

ASSISTANT: Hello. How can I help you today?

USER: I am planning to go for technical tour to NASA space centre which is at Houston, HOU.Can you please help me in booking a flight ticket from Washington, IAD?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to start my journey on 12/06.

ASSISTANT: How much you can afford for flight ticket?

USER: After completing the tour, I intend to return on 12/08.

ASSISTANT: There is a UA 1026 airline which matches your requirements.

USER: I can afford up to 200.

ASSISTANT: Shall I proceed with booking with fare of 100?

USER: Is it a direct flight?

ASSISTANT: It is a connection flight.

USER: Please do not confirm, I need a direct flight only.

ASSISTANT: Sure, thank you for approaching us.

USER: Thank you for providing the information.