You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michael White.

ASSISTANT: White, how may I help you?

USER: My home town is Las Vegas LAS. I want to visit Atlanta to meet my brother, could you help me in booking a flight ticket/.

ASSISTANT: Sure, please provide your itinerary dates.

USER: My travelling dates are 03/13 and return on 03/15.

ASSISTANT: May I know your terminus airport code?

USER: My destination airport code is ATL.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure.

ASSISTANT: Sorry Michael, no flight is available on your route.

USER: That's fine.

ASSISTANT: Thank you for contacting us.