You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me to book flight ticket from LAX to CLT?

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

USER: My travelling dates are June 28 and June 30.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight for this trip.

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

USER: I prefer a economy class to travel.

ASSISTANT: May I know your name to proceed further?

USER: Margaret Harris here.

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

USER: Not an issue, thank you.

ASSISTANT: Thank you for contacting us.