You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ronald Carter here.

ASSISTANT: How can I help you Ronald?

USER: There is a special flight between LAS to ORD because of heavy crowd, please check whether the flight is there or not.

ASSISTANT: May I know which date you want to departure from LAS.

USER: Sure, it is on 12/26.

ASSISTANT: Do you want me to book return flight ticket also?

USER: My return is on 12/28. Please make sure that flight should be with 1 connection.

ASSISTANT: Sorry for the inconvenience, no flights available as per your requested dates.

USER: Ok, that's not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.

ASSISTANT: You are welcome.