You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: Can you please help me in booking the flight ticket from SFO to HOU?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: My travel dates are Nov 8 and Nov 10.

ASSISTANT: Ok, please let me know the timings of your journey.

USER: Any time is ok for me.

ASSISTANT: Do you prefer any specific class to travel?

USER: No.

ASSISTANT: Are you looking for connecting flight or direct flight only you want?

USER: I need a direct flight.

ASSISTANT: Can I have your good name please?

USER: Stephen Hall.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry Stephen Hall, no direct  flight is available to you on your dates.

USER: Ok, thank you for the information.

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