You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have to go Los Angeles for my film shooting purpose, can you please book a flight ticket from ORD airport?

ASSISTANT: Can I know your travel dates?

USER: My departure date is 02/18 and please book my return ticket also on 02/20.

ASSISTANT: Please mention your origin airport code?

USER: My destination airport is LAX.

ASSISTANT: Can I know your name for booking the ticket?

USER: Sure, my name is Samantha Brown.

ASSISTANT: The flight 1000 of Southwest airlines is available on your requested dates. Shall I proceed?

USER: Please confirm this flight ticket for me.

ASSISTANT: Samantha, your reservation has done successfully.

USER: Thank you for your help.

ASSISTANT: You are welcome.