You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My name is Kathleen Harris. I want to book a flight ticket from 12/26 to 12/28.

ASSISTANT: May I know your airport codes?

USER: Destination is to EWR and source is from LAS.

ASSISTANT: Do you have any specifications to be met?

USER: I need single connection in my journey and price should be 200.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: I found a flight with airline:Southwest and single connection. Your fare is on 100 with the flight number is 1027. Shall I proceed with the booking?

USER: Procced.

ASSISTANT: Sure. Your ticket has been booked. Thank you for reaching us. Have a nice journey.

USER: Thanks for your help.