You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Ronald Green. I have to attend a Live Concert at Minneapolis & St. Paul, could you please help me with booking a flight ticket from LAX to MSP?

ASSISTANT: Sure, can you please share your travel dates?

USER: I would like to depart on June 7th and return on June 9th.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specification that you are looking for?

USER: Make sure that my return time is afternoon.

ASSISTANT: Ronald Green, I am sorry to inform you that there is no flight available at your request.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: You are welcome. Thank you for contacting us.