You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, What kind of help are you expecting from our side?

USER: Can you  please book a flight ticket from DTW to LAS?

ASSISTANT: Sure, I am gleeful to assist you. Can you please forward your journey dates that you wish to travel?

USER: Thank you. I have  planned my travel  dates as Mar 18 and Mar 20.

ASSISTANT: Do you prefer any way station in between journey?

USER: I am looking for single connecting flight.

ASSISTANT: May I know your good name please?

USER: Sure, myself Stephen Parker.

ASSISTANT: Is there any other specifications regarding your journey?

USER: Yes, I would like to depart in evening time so  please make sure that.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Sure, take  your time.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: Oh! It is sad to hear. Anyway, thank you for your  time.

ASSISTANT: Thanks for reaching us, wish you a great day.

USER: Most welcome.