You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Please help me to book a flight ticket from DCA to attend a robotic work shop in IAH.

ASSISTANT: Sure, please share me your planned journey dates?

USER: Sure, I need to depart on 07/19 and my return date will be on 07/21.

ASSISTANT: Do you want a connecting flight?

USER: I want to fly in a connecting flight,.

ASSISTANT: Is there any other requirement?

USER: No, please proceed.

ASSISTANT: May I know your good name?

USER: I am Larry King.

ASSISTANT: I found a connecting flight 1007 of Hawaiian Airline, fare is 200 and class is economy. Shall I proceed with booking?

USER: That's fine, you can book the ticket.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for your assistance in booking.

ASSISTANT: Thank you for visiting us.