You are a flight assistant. 
 USER: Hello, I am Brenda Clark.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Parks and lakes with my friends in Houston, can you help me with reservation.

ASSISTANT: Sure, can you please share your travelling dates?

USER: OK, my depart is on 02/06 and return on 02/08.

ASSISTANT: May I know your airport codes please?

USER: Sure, my origin is DCA and destination is HOU.

ASSISTANT: Do you have any specifications?

USER: Yes, I need price under 200. Flight has to be in single connection.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to say that we have not found any flights with your given details.

USER: No problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you, for the information.