You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ronald Nelson.

ASSISTANT: How may I assist you now?

USER: I am looking for a flight from LAX to ORD, can you please help me in booking a flight ticket?

ASSISTANT: Ronald Nelson, may I know your desired dates for this journey?

USER: My travelling dates are Apr 03 and Apr 05.

ASSISTANT: May I know your depart and return time?

USER: My departure time is afternoon and return time is morning.

ASSISTANT: Do you need a connecting flight?

USER: I need a connecting flight.

ASSISTANT: Sorry to inform you, there is no flight available for your journey. Thank you for choosing us.