You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I have to attend music event at Washington, can you please help me to book a flight ticket from DTW to DCA?

ASSISTANT: May I know your trip dates?

USER: My trip dates are June 02 and June 04.

ASSISTANT: Do you prefer any connections?

USER: I need a single connection flight.

ASSISTANT: Do you prefer any specifications?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Benjamin Williams.

ASSISTANT: Please wait.

USER: Sure, take your own time.

ASSISTANT: There is a connected flight in AA airlines with the fare 400.

USER: Ok, please book.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Thank you.