You are a flight assistant. 
 USER: Hello, Stephanie Carter here.

ASSISTANT: Hello, how can I best aid you now?

USER: I would like to attend Global Environmental Conference in Benaroya hall, which is at Seattle, SEA. So, please help me with a flight with price within 500.

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, I will depart on 09/09 and return back on 09/11.

ASSISTANT: Please share me your boarding point?

USER: I will catch my flight from HOU.

ASSISTANT: Do you need any lay by in between journey?

USER: Yes, I need a break in between my journey.

ASSISTANT: There is a flight found with Southwest airline of flight number 1009 and fare is 100. Shall I proceed for booking?

USER: Yes, you can proceed.

ASSISTANT: Your ticket has been processed.

USER: Thank you for your service.

ASSISTANT: Thanks for connecting us, have a nice journey.