You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Charles Lewis here.

ASSISTANT: Good afternoon, ABC agency. How may I help you?

USER: I need a reservation by your ABC agency from Oakland to Washington for exploring the beauty of the city.

ASSISTANT: Sure, I am happy to help you, may I know your airport cods and dates please?

USER: My airport codes will be OAK to DCA. As I will be coming before new year my dates will be from 12/29 to 12/31.

ASSISTANT: There is a flight with 1 connection, It cost you 100. Can I proceed for booking?

USER: What airlines is the flight availability from?

ASSISTANT: It's a southwest airlines.

USER: Ok, proceed with booking my tickets.

ASSISTANT: Your booking is confirmed in southwest airlines, 1001 flight number.

USER: Thank you for booking.

ASSISTANT: Have a safe journey.

USER: You are welcome.

ASSISTANT: Thank you.