You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Nicole Martin, can you help me to book a flight with 0 connection for a round trip?

ASSISTANT: Sure, can I know your travel dates please?

USER: I would like to start my journey on 12/09 and I would like to book a return ticket on 12/11.

ASSISTANT: Could you provide airport your code please?

USER: My preferred airport would be Las Vegas, NV - LAS.

ASSISTANT: Sorry, there are no flights with 0 connection.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your help.