You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please help me in booking a flight ticket to LAS from ATL?

ASSISTANT: May I know on which dates you are willing to travel?

USER: Sure, I am willing to travel are from May 11 to May 13.

ASSISTANT: Do you require any specifications in your journey?

USER: I need single connecting flight for my journey.

ASSISTANT: May I know your name?

USER: Sure, my name is James Turner.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you.