You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Cynthia Martin. I am planning to visit Downtown Aquarium at Houston. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, I can help you with that. Can you please share your preferable travel dates?

USER: I would like to take off on 07/10 and return on 07/12.

ASSISTANT: Could you please help me with the airport codes?

USER: My origin airport code is PHL and destination airport code is HOU.

ASSISTANT: Please allow me a moment to check for the availability of flight.

USER: Sure, take your time. Please make sure that the connection is 1.

ASSISTANT: Cynthia, there is flight available with price 900. Is that ok for you?

USER: Can you please find a flight with ticket fare 200 or less?

ASSISTANT: I am sorry to inform you that there is no flight available with lowest fare.

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: You are welcome. Thank you for contacting us, have a great day.