You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Amy White here.

ASSISTANT: How can I assist you at this moment?

USER: Actually, I am looking for a flight having single connection because my friend also booked the same flight that I want to travel, so can you please help me out with booking of a flight ticket from Atlanta on 12/21?

ASSISTANT: Sure, I am happy to help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Could you please let me know your preferable airport code names?

USER: Sure, I want to travel from ATL to LAS.

ASSISTANT: Is there any return trip that your planning to ATL?

USER: Yes, I would like to return on 12/23.

ASSISTANT: Please give me a moment, I will check flight availability in this route.

USER: Ok, take your time.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 is provided by Southwest airlines. Shall I proceed with this?

USER: That's great, you can proceed with booking.

ASSISTANT: I have confirmed your flight ticket, flight number is 1000.

USER: Thank you for your assistance in booking of my ticket, have a nice day.

ASSISTANT: Thank you for reaching us, have a good day.

USER: Welcome.