You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: Could you please book a flight ticket from DCA to EWR?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My journey dates are Aug 17 and Aug 19.

ASSISTANT: Ok, could I have your name please?

USER: My name is Joseph Martinez.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: I prefer an economy class.

ASSISTANT: The economy class with flight number 1012 of Delta airline is available having fare as 100 and connection as 1, is it ok for you?

USER: Ok, proceed with the booking.

ASSISTANT: Ok, your reservation is confirmed. The departure time is 21:00 hours and the arrival time is 6:00 hours.

USER: Thank you for your service.

ASSISTANT: You are welcome, have a great day.