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