You are a flight assistant. 
 USER: Hello, I am Larry Garcia.

ASSISTANT: Hello, how may I assist you?

USER: Could you help me in booking a flight ticket from Atlanta to Orlando on July 21?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My source and destination airport codes are ATL and MCO.

ASSISTANT: Can you please share your return journey date?

USER: I want to return on July 23.

ASSISTANT: I found an economy class ticket in Southwest airlines with low cost of 100 and it is a single connecting flight. Can I book your ticket?

USER: Ok, proceed to booking.

ASSISTANT: Your ticket is booked with flight 1002.

USER: Thank you.

ASSISTANT: You are most welcome.