You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephen Campbell.

ASSISTANT: How can I assist you at this moment?

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

ASSISTANT: Sure. Can you please let me know your preferable travel dates for booking flight ticket?

USER: I would like to take off on 02/09 and return on 02/11.

ASSISTANT: Please give me a moment, I will check flight availability in this route.

USER: Sure, take your time.

ASSISTANT: Based on your information, I have found a flight with 1 connection with the fare of 100 provided by Hawaiian airlines. Shall I proceed with this?

USER: Please confirm the booking.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1016.

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

ASSISTANT: Thank you for reaching us.