You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Walker.

ASSISTANT: How can I assist you?

USER: Can you please help me in booking a flight ticket from DC-IAD to reach ATL?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from Apr 22 to Apr 24.

ASSISTANT: Ok, do you have any class preferences?

USER: No.

ASSISTANT: Ok, flight-1000 is available in Southwest airline with single connection and the flight fare is 300. Can I proceed with the booking?

USER: You can proceed to booking.

ASSISTANT: Your booking is confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.