You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I serve you?

USER: My name is Virginia Brown and I want to book a ticket. I would like to travel from Las Vegas to Chicago.

ASSISTANT: Please, Let me know your journey point and journey dates?

USER: The airport codes are from NV-LAS to IL-ORD  and my journey dates are from Jun 23 to Jun 25.

ASSISTANT: OK,Please wait for a moment I will check and let you know.

USER: Could you please make sure that the price limit should be 1000 with only one connection.

ASSISTANT: Thanks for your patience.No flights found as per your requirements.

USER: OK, Thank you for your service.

ASSISTANT: OK,Thank you.