You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicholas Turner here.

ASSISTANT: How can I assist you today?

USER: I need to book a flight ticket from Detroit, my preferable airport codes are from DTW to IAH.  Can you please help me with booking?

ASSISTANT: Sure, I can help you with that. May I know your preferable travel dates please?

USER: My preferable travel codes are from 05/13 to 05/15.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: UA airlines is having a flight on that route with travel charge of 200, shall I proceed for booking?

USER: If it is a direct flight, you can proceed with that ticket booking.

ASSISTANT: It's having a single halt in between your source and destination, Turner. There are no direct flights available for you on those dates.

USER: Not a problem, anyway, thank you for the information.

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

USER: Thank you for searching.