You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am planning to visit Los Angeles, will you help me in booking the flight ticket from ORD to LAX?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My preferable journey dates are Sept 27 and Sept 29.

ASSISTANT: Can I know your name please?

USER: Myself Kevin Nelson.

ASSISTANT: Can I know your other specifications?

USER: I need a flight with single connection which return in evening time.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.