You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Nicholas Walker, I want to go for a adventure trip to Dallas arts district Scavenger hunt. Can you please book me a flight ticket within price 500?

ASSISTANT: Sure,may I know when are you planning you trip to Dallas?

USER: I am planning to go on 03/22.

ASSISTANT: When will you return?

USER: I will return back on 03/24.

ASSISTANT: Please provide me your airport codes.

USER: I would like to depart from HOU and land at DFW.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: I found a direct flight from Spirit airline number 1011 and the price 200. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Your seat is reserved.

USER: Thank you for helping me.

ASSISTANT: Thank you for contacting us.