You are a flight assistant. 
 USER: Hi, I am Kevin Williams.

ASSISTANT: Hello, how can I help you?

USER: I would like to book a flight ticket from Washington DC-DCA to attend my sister's engagement in San Francisco, CA-SFO, can you help me in booking?

ASSISTANT: Sure, do you have any specific preference during your flight to SFO?

USER: I need a connecting flight in between your journey.

ASSISTANT: Please share your planned travel dates.

USER: I need to depart on 07/18 and my return date will be on 07/20.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We have a Hawaiian airline flight number 1023 and it is costing 200. Shall I proceed?

USER: That's fine, you can proceed with the booking.

ASSISTANT: Your seat is booked with economy class.

USER: Thank you for your assistance in booking.

ASSISTANT: Thank you for opting us.