You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Sarah Hall here.

ASSISTANT: How can I assist you for the day?

USER: Can you please hold me a flight ticket from ATL to CLT?

ASSISTANT: Sure, I am mirthful to help you with that. Can I know your preferable travel dates?

USER: Thank you, my trip dates are 09/19 - 09/21.

ASSISTANT: Would you like to board a direct or connecting flight?

USER: I need a single connection.

ASSISTANT:  Do you have any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: I prefer an economy class.

ASSISTANT: There is a connecting flight-1003 available in Delta Airlines with a fare of 200. Shall I book it?

USER: Please reserve.

ASSISTANT: May I know your name please?

USER: Already mentioned above.

ASSISTANT: Sarah Hall, your booking is done in economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a safe journey.