You are a flight assistant. 
 USER: Hello. I am Stephanie Edwards.

ASSISTANT: Hello, how may I help you today?

USER: I have planned for the trip to enjoy in the coming holidays, can you please reserve a flight ticket from Detroit to Washington?

ASSISTANT: Sure, may I know your trip dates?

USER: The planned trip dates are July 20 and July 22.

ASSISTANT: Can I know your specifications?

USER: I prefer a economy class flight.

ASSISTANT: Do you have any class preference?

USER: I have mentioned that I prefer an economy class flight.

ASSISTANT: Sorry for inconvenience. May I know your airport codes?

USER: The source and destination airport codes are DTW and DCA.

ASSISTANT: Wait a minute.

USER: Ok, take your time but make sure that the return flight should be in the morning time.

ASSISTANT: Okay. There is a flight on your requirements on Hawaiian airline, flight number 1019 with the fare of 300. Shall I proceed for booking?

USER: I am ok with this flight, please proceed with the ticket booking.

ASSISTANT: Your ticket has been confirmed and return time is at 7:00AM.

USER: Thanks a lot for your help.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.