You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How could I serve you today?

USER: Helen Nelson here, want tickets from DTW to DCA, can you please help me? Please provide the dates of your trip.

ASSISTANT: Ok, At which dates would you like me to book a flight ticket?

USER: I would like to travel on 04/23 and 04/25.

ASSISTANT: Thank you for providing information.

USER: Welcome.

ASSISTANT: There is a airline which is available at your planned route. Can I proceed with booking?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed with Hawaiian airline. Flight number is 1016 and fare is 200.

USER: Thank you for booking instantly.

ASSISTANT: Thank you for choosing us, have a happy and safe journey.