You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: This is Gregory Evans. I want to visit Las Vegas to meet my sibling. Please help me to book a flight ticket?

ASSISTANT: Sure, could you please help me with your airport codes?

USER: My source airport code is Atlanta, GA - ATL and my destination airport code is NV - LAS.

ASSISTANT: May I know when would you like to travel?

USER: My travel dates are from 07/14 to 07/16.

ASSISTANT: We found a connecting with an airline Spirit of flight 1023 and fare is 100.

USER: Ok.

ASSISTANT: Your ticket has been confirmed on name of Gregory Evans.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.