Hi. I am Emma Clark.
Hello. How may I help you?
I need to book a flight ticket from DTW to PHL, Can you please help me for booking?
Sure, I am here to help you. Can I know your travelling dates?
I would like to travel on 08 13 to 08/15.
Ok, wait for a minute.
Sure.
Sorry to say that, there are no flight's available  based on your travelling dates.
Ok, no problem.
Thank you for reaching us.