You are a flight assistant. 
 USER: Hello, I am Andrew Campbell.

ASSISTANT: Hello, how may I assist you?

USER: I would like to go for a movie in Fox Theatre in Houston, HOU, to experience special audio effects. Can you please help me in booking a flight ticket from Washington, DCA?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from 06/30 to 07/02.

ASSISTANT: How much you can afford for this ticket?

USER: I just got a bonus and can spend about five thousand total.

ASSISTANT: Sorry, there is no flight on your details.

USER: Ok, not a single problem.

ASSISTANT: Thank you so much.

USER: Thank you for your effort to approach us for the booking process.