You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Brian Parker here. I want to travel from Houston to New York for a business trip. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I can help you in booking flight ticket. Can you please mention your travel dates for booking flight ticket?

USER: My departure date is 06/12 and return date is 06/14.

ASSISTANT: May I know your preferable airport code names?

USER: My airport codes are from IAH to LGA.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Ok, I will wait. Make sure my price limit is 500.

ASSISTANT: Sure. Sorry no flights available in this route as per your requested budget limit.

USER: Anyway, than you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.