You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me to search a flight from Chicago, IL-ORD?

ASSISTANT: Sure, please share your desired travel dates.

USER: The desired travel dates are 10/26 to 10/28.

ASSISTANT: Please share your landing airport code.

USER: The landing airport code is Las Vegas, NV-LAS.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Ok, no problem.

ASSISTANT: May I know your name please?

USER: Sure, my name is Dorothy Rodriguez.

ASSISTANT: Thank you for opting us.