You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am planning in the month of December, so I need a advance flight ticket booking. Can you please help me in flight ticket booking from DTW to HOU?

ASSISTANT: Sure, I am here to help you. Would you please provide me your journey dates?

USER: Ok, my preferable travel dates are 12/04 and 12/06.

ASSISTANT: May I know your name please?

USER: Ok, my name is Elizabeth Gonzalez. I need a direct flight.

ASSISTANT: Sorry, there are no direct flights available on your preferable dates.

USER: Ok, not an issue. Thank you for your help.

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