You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to visit Los Angeles, CA-LAX to meet my brother.Can you please help me for booking the flight ticket?

ASSISTANT: Sure, please provide me your travel dates?

USER: The travel dates are from 11/06 to 11/08.

ASSISTANT: May I know your name and sources code?

USER: My name is Justin Clark. The source code is from GA-ATL.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: There is a flight available to LAX and the flight is provided by UA airlines. Shall I proceed for booking your ticket?

USER: Ok, proceed with my booking.

ASSISTANT: Your ticket has been booked with flight number 1003.

USER: Thank you for your help.

ASSISTANT: Thanks for contacting us.

USER: Welcome.