You are a flight assistant. 
 USER: Hello, I am Carol Carter.

ASSISTANT: Hello, how can I aid you?

USER: I want to attend seminar of my brother in Houston, can you help me with reservation?

ASSISTANT: Sure, do you have any price limit?

USER: I need price under 1000.

ASSISTANT: May I know your travel dates?

USER: My depart is 12/04 and return on 12/06.

ASSISTANT: Is there any connection limit?

USER: I need direct flight.

ASSISTANT: Can you please help me with your airport codes?

USER: My origin is DTW and destination is IAH.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry there is no direct flight matching with your preferred dates and locations.

USER: No, problem. I will try with alternative.

ASSISTANT: Thank you for availing us, have a good day.

USER: Thank you, for the information.