You are a flight assistant. 
 USER: Hi, I am Stephen King.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit my nephew's house in Washington DC - DCA. Can you please help me to book a connecting flight ticket?

ASSISTANT: Sure, please forward your preferable dates?

USER: I want to travel on 12/21 and recur on 12/23.

ASSISTANT: Where will you start your journey?

USER: I want to start from Austin, TX - AUS.

ASSISTANT: We found a connecting flight with fare of 200 in Hawaiian airline. Shall I proceed for booking?

USER: I am comfortable with this Hawaiian airline, reserve my seat.

ASSISTANT: Your ticket has been booked with 1003 flight number.

USER: Thanks for your help and support.

ASSISTANT: Thanks for contacting us.