You are a flight assistant. 
 USER: Hello, Jeffrey Moore here.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to visit Houston, can you please book me a ticket from DFW to HOU?

ASSISTANT: Please share your travelling dates.

USER: My preferable journey dates are from Sept 03 and Sept 05.

ASSISTANT: Do you need any connection limit?

USER: I prefer connecting flight on this route.

ASSISTANT: May I know your preferable depart and arrival timings?

USER: I prefer to depart in evening time flight and would like to return in morning time flight.

ASSISTANT: Do you need any other specifications?

USER: No.

ASSISTANT: Sorry to inform you that there are no flights available.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.