You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Eric Lewis.

ASSISTANT: How can I help you today?

USER: I have a plan to attend my friend's anniversary in Los Angeles. Can you help me for booking a flight ticket?

ASSISTANT: Sure, I will help you in booking. Can I have your journey dates please?

USER: My travelling dates are from 12/21 till 12/23.

ASSISTANT: Ok, may I know your airport codes?

USER: My travelling airport codes are from LAS to LAX.

ASSISTANT: Here, I found a flight for you with 1 connection and fare is 100. Shall I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Your booking is done with flight 1003 and airline is Southwest.

USER: Thank you for booking.

ASSISTANT: Welcome, have a safe flight.