You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can help you at this moment?

USER: I would like to book my ticket from DFW to DTW. Will you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: My preferable travel dates are from Sept 16 to Sept 18.

ASSISTANT: May I know your name for further process?

USER: Sure, Emma Smith here.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No, I am comfortable to travel in any flight timings.

ASSISTANT: Do you have any another specifications?

USER: I am looking for a direct flight in my journey.

ASSISTANT: Ok, please hold on a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.