You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am interested to gather the history. So I am planning to visit some historical places in Houston.

ASSISTANT: Good to hear that.

USER: Can you help me to search the flight ticket?

ASSISTANT: Sure, I can help you with that. Can you please help me with the source and the destination airport codes?

USER: The source airport code is New York, NY-JFK and the destination airport code is Houston, TX-IAH.

ASSISTANT: Could you please provide your travelling dates?

USER: My travelling dates are 01/29 and 01/31.

ASSISTANT: May I know your name to proceed further?

USER: My name is Frank Martin.

ASSISTANT: Thank you for providing. Frank, there is a flight available at your request with price 300. Would you like me to proceed the booking?

USER: No, my budget is 200 only. Can you please check the for flight with price 200?

ASSISTANT: I am really sorry to inform you that there is no flight available with price 200.

USER: Its ok, don't book the ticket.

ASSISTANT: Ok.

USER: Thank you for the information.

ASSISTANT: You are welcome. Thank you for contacting us.