You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: My name is Elizabeth Green and I want to book a ticket.

ASSISTANT: OK, can you please provide your journey details?

USER: Sure, I would like to travel from Chicago, IL - ORD to Chicago, IL-ORD and my journey dates are from Jun 14 to Jun 16.

ASSISTANT: Do you have any restrictions about price limit and connection limit?

USER: Yes, Can you make sure that the price limit must be 200 with one connection?

ASSISTANT: Thank you for providing your details. Please wait for a moment, I will check and get back to you.

USER: OK.

ASSISTANT: Sorry, there is no flight found matching with your requirements. Thank you and have a nice day.

USER: Thank you for your service.