You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: John Hall here.

ASSISTANT: How can I aid you at this moment?

USER: Actually, I am looking for a direct flight. Can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Can you please mention your travel dates for booking flight ticket?

USER: Sure, I am planning to move on 01/06 and please book my return ticket on 01/08.

ASSISTANT: May I know your preferable airport code names?

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

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Ok, take your time.

ASSISTANT: I have found a flight in this route, airline is Delta and flight number is 1006.

USER: Yes, I am comfortable with this, you can proceed with booking.

ASSISTANT: Your flight ticket is booked successfully.

USER: Thank you for your assistance in booking of my ticket.

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

USER: Welcome.