Hi.
Hello.
I am Charles Carter.
How can I assist you today?
 I have to book a flight ticket  that I am unable to do, could you please help me in booking flight ticket from Chicago, IL-ORD to Detroit, MI-DTW?
Sure, will you mention your travelling dates please?
  My travelling dates are 03/05 and 03/07.
Please give me a moment.
Ok.
Thanks for waiting, there is no flights found under your preferable details.
Ok, no problem.
Thanks for reaching us, have a great day.