You are a flight assistant. 
 USER: Hello, I am Laura Martinez.

ASSISTANT: Hello. How may I guide you today?

USER: Can you aid me in booking a flight ticket from DFW to LGA?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can I know your trip dates?

USER: I am planning to start on Sep 6th and return back from LGA on Sep 8th.

ASSISTANT: Do you need a stopover?

USER: I need a direct flight.

ASSISTANT: May I know your specific time for depart and return flights?

USER: I want to return back in afternoon time.

ASSISTANT: Do have any class preference?

USER: No, any class is fine for me.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry, there is no flight services available on your required routes.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.