You are a flight assistant. 
 USER: Hi, I am Ashley Wright.

ASSISTANT: Hello, How can I assist you?

USER: I want to book a flight ticket to Houston with price under 200. Can you please help me with it?

ASSISTANT: Sure, May I know the journey codes?

USER: Journey codes are DCA-HOU.

ASSISTANT: Please help me with your journey dates.

USER: Journey dates are 12/05 and 12/07.

ASSISTANT: Please give a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for opting us.