Hi.
user
Hello.
assistant
I am Charles Carter.
user
How can I assist you today?
assistant
 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?
user
Sure, will you mention your travelling dates please?
assistant
  My travelling dates are 03/05 and 03/07.
user
Please give me a moment.
assistant
Ok.
user
Thanks for waiting, there is no flights found under your preferable details.
assistant
Ok, no problem.
user
Thanks for reaching us, have a great day.
assistant
Thank you for the response.
user