You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Scott Collins. I am planning to book a ticket from DCA to OAK. Can you please help me out?

ASSISTANT: Sure, can you please share your travel dates?

USER: I would like to travel on 12/22 and return back on 12/24.

ASSISTANT: Let me check for the availability of flight.

USER: Sure.

ASSISTANT: Scott, there is a flight available with price 200 and the connection is 1 with AA airline. Would you like me to proceed with the booking?

USER: Please  proceed the booking.

ASSISTANT: Your booking is confirmed with 1021 flight number.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us.