You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you book a flight ticket to DFW from HOU?

ASSISTANT: Please share your trip dates.

USER: My trip is in Nov from 17th to 19th.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: If you have any other specifications, let me know?

USER: Yes, I travel in business class.

ASSISTANT: May I know your name?

USER: Brandon Taylor here.

ASSISTANT: There are no flights available on your routes.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.