You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am William Jones.

ASSISTANT: How may I assist you?

USER: I am planning to visit Olympic National Park at Washington, could you please help me with booking a flight ticket from BOS to DCA?

ASSISTANT: Sure, I am happy to help you and can you please mention your preferable travel dates of your journey?

USER: I would like to take off on 04/19 and return on 04/21.

ASSISTANT:  I have found a flight in economy class with a ticket fare of 200 and there is a 1 halt in between your journey, can I confirm your flight ticket booking?

USER: Please confirm the booking.

ASSISTANT: Ok, your flight ticket booking is done in 1029 flight number in Delta airlines to reach your location.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: You are most welcome and have a happy journey.