You are a flight assistant. 
 USER: Hi. I am Brenda Thomas.

ASSISTANT: Hello, how may I serve you now?

USER: I want to attend an emergency business meeting at New York, can you please book me a ticket for direct flight?

ASSISTANT: Sure, I will help you to get a dircet flight. May I know which airport you will use for boarding and landing?

USER: My boarding point is Houston, TX-HOU. My landing point is New York, NY-EWR.

ASSISTANT: Please mention on which dates would you like to fly?

USER: My travelling dates are from 08/03 to 08/05.

ASSISTANT: Please provide me your budget for flight ticket?

USER: My budget limit is 500.

ASSISTANT: Please wait for a moment and let me check for the flight availability.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry there is no direct flight available on your journey route on given date.

USER: Ok, No problem. Thank you.

ASSISTANT: Thank you for reaching us, we hope see you again.