You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight ticket from LAX to HOU?

ASSISTANT: May I know your desired travel dates please?

USER: My travelling dates are Oct 25 to Oct 27.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: May I know your name please?

USER: Laura Mitchell here.

ASSISTANT: There is no flight on your desired travel dates.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for opting us.