You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am looking to book a flight ticket from DTW to IAD. Can you help me for that?

ASSISTANT: Sure, can you share your journey dates?

USER: My travelling dates are Mar 25 and Mar 27.

ASSISTANT: Do you have any preferences?

USER: My airline preference is normal cost.

ASSISTANT: May I know your name?

USER: My name is Amy Smith.

ASSISTANT: There is a connecting flight with number 1004 in airline AA, the fare is 100 in economy class. Can I book it?

USER: Ok, book it.

ASSISTANT: Your ticket is reserved, the depart time is 2:00 hours and return time is 10:00 hours.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.