You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning for vacation, from IL-ORD to NV-LAS.Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your preferable dates of travel please?

USER: The travelling dates are from 03/28 to 03/30.

ASSISTANT: The flight with airline Spirit and connections limit 0 of cost 100 has found.

USER: Sorry, I want the flight with 1 connection. Thank you for your information.

ASSISTANT: Sorry, there is no flight is available with connection 1.

USER: Ok, It's fine.

ASSISTANT: Thank you, for contacting us. May I know your name please?

USER: My name is Margaret Davis.

ASSISTANT: Thank you.

USER: You are welcome.