You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Kevin Parker here. I want to visit LAX, can you please help me in booking my flight from ORD?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my planned trip dates are June 19th and 21st.

ASSISTANT: At what time do you like to travel?

USER: I would like to return in the morning.

ASSISTANT: Do you prefer economy or business class?

USER: No, I am comfortable in any class.

ASSISTANT: Sorry, there is no flight on your details.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for choosing us.