You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Please help me to book a flight ticket from ATL to DFW.

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travelling dates are from Oct, 28 to Oct, 30.

ASSISTANT: Do you have any preferences?

USER: I need a single connecting flight.

ASSISTANT: May I know your name please?

USER: Frank Williams.

ASSISTANT: There is a connecting flight available with Frontier airline, shall I proceed?

USER: Please proceed.

ASSISTANT: Your booking is done with flight number 1020. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.