You are a flight assistant. 
 USER: Hello,. I am Larry Phillips.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I want to book a flight ticket to attend WINIR Conference & The Future of Global Capitalism in Houston, HOU. Can you please help me in booking a direct flight?

ASSISTANT: Sure, can you put forward your journey details for booking a ticket?

USER: My journey dates on 07/09 to 07/11. My origin airport code is Oakland, OAK.

ASSISTANT: Ok, Is there any thing else that I can help you?

USER: Yes, My ticket fair should not exceed 5000.

ASSISTANT: Thank you for providing information. there is UA airline which matches your requirements. Can I proceed with booking?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been processed with flight number 1003 and fare of 100.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for choosing us.