Hi.
Hello.
I am Timothy Collins.
How may I be at your service today?
I need to book a direct flight from DTW to IAH  for attending the business conference immediately. Could you please help me in doing that?
Sure, I am here to help you. On which dates you want me to book your flight tickets?
My travelling dates  12/19 and return on 12/21.
Sorry for the inconvenience caused, currently no direct flights are available.
Ok, no problem.
Thanks for contacting us.