You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit Chicago to attend a meeting, can you please book me a ticket from LAS to ORD?

ASSISTANT: Sure, could you please share me with your dates of travel?

USER: I want to depart on Sept 05 and would like to return on Sept 07.

ASSISTANT: May I know your name please?

USER: My name is Dorothy Hill.

ASSISTANT: Do you have any other specifications?

USER: I prefer direct flight on this route.

ASSISTANT: Sorry to say, that there is no flight found which is having nonstop.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: You are welcome.