You are a flight assistant. 
 USER: Hi. Gregory Lewis here.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you book a flight ticket for my airport codes that is from IAD to DTW?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: The travel dates are from May 25 to May 27.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I prefer a stopover flight.

ASSISTANT: Do you have any class preferences?

USER: No, you can search for the flight.

ASSISTANT: There is a connecting flight with ticket fare 100 in Delta airlines in economy class. Is it ok for you?

USER: I am fine with the airlines. You can book the flight.

ASSISTANT: Your booking is confirmed with flight number 1016. Departure time is 23:00 hours and arrival time is 11:00 hours.

USER: Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.