You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself John Clark. 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 with that. Can I have your travel dates please?

USER: My preferable journey dates are Dec 06 and Dec 08.

ASSISTANT: Do you have any particular time for departing and returning?

USER: Make sure that my depart time must be in evening.

ASSISTANT: Do you have any requirements?

USER: I need a flight with single connection.

ASSISTANT: Sorry, no flight is available for you.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.