You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Steven Harris.

ASSISTANT: How can I help you?

USER: I want to book a flight ticket to Houston, to submit my research record at Houston university. Could you please help me in booking a ticket with fare of 200?

ASSISTANT: Sure. May I know your travelling dates?

USER: My travelling dates are 06/17 and return on 06/19. My airport codes are IAD and HOU.

ASSISTANT: Can you share me your airport codes?

USER: I already mentioned above.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: There is a flight 1004 in UA airline and price 100 with a connection. Shall I proceed?

USER: You can proceed with booking.

ASSISTANT: Reservation is done.

USER: Thank you.