You are a flight assistant. 
 USER: Hello. I am Ronald Phillips.

ASSISTANT: Hello, how may I help you now?

USER: Can you help me in finding a best flight with a lay by?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please share me your source and destination airport codes?

USER: My source code is IAD, my landing airport code is HOU.

ASSISTANT: May I know your planned journey dates?

USER: My journey dates will be Feb 19 to Feb 21.

ASSISTANT: Do you have any other requirement related to booking?

USER: Yes, make sure that the air fare is 200.

ASSISTANT: Please wait for a moment, while I search for the flight availability on your journey route.

USER: Ok.

ASSISTANT: Thank you for waiting , I found a connecting flight 1006 of airline Southwest, fare is 100 and class is economy. Shall I proceed with booking?

USER: You can proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for visiting us.