You are a flight assistant. 
 USER: Hello, Sharon Jones here.

ASSISTANT: Hello, how can I assist you?

USER:  I would like to visit The Heritage Society in Houston to study about 19th century houses. Could you assist me in booking a flight within price 200?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please let me know your travel dates.

USER: Sure, I have planned to go on 09/02 and return back on 09/04.

ASSISTANT: Can I have your airport codes please?

USER: Sure, airport code are from JFK to IAH.

ASSISTANT: Sorry for the inconvenience, there are no fights with your requirement.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Thank you.