You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Shirley Young. I want to book a ticket to for attending a seminar in Chicago, ORD. I would be like to book a ticket form Los Angeles, LAX. Can you help me out?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates on 10/02 to 10/04. I need single connection. Price range should be under 500.

ASSISTANT: Ok. Please wait for a while.

USER: Sure.

ASSISTANT: There are no flights found on your given requirements.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you have a nice day.